diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 72163610..4223a6b1 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -15,13 +15,13 @@ if(${TARGET_PLATFORM} MATCHES ${DEFINE_LINUX})
     # set(TEST_LINUX_MOCK     "${TEST_LINUX_MOCK},--wrap=gethostbyname" CACHE STRING INTERNAL FORCE)
     # set(TEST_LINUX_MOCK     "${TEST_LINUX_MOCK},--wrap=connect" CACHE STRING INTERNAL FORCE)
     # set(TEST_LINUX_MOCK     "${TEST_LINUX_MOCK},--wrap=socket" CACHE STRING INTERNAL FORCE)
-    # set(TEST_LINUX_MOCK     "${TEST_LINUX_MOCK},--wrap=select" CACHE STRING INTERNAL FORCE)
+    set(TEST_LINUX_MOCK     "${TEST_LINUX_MOCK},--wrap=fx_select" CACHE STRING INTERNAL FORCE)
     # set(TEST_LINUX_MOCK     "${TEST_LINUX_MOCK},--wrap=linux_open" CACHE STRING INTERNAL FORCE)
     # set(TEST_LINUX_MOCK     "${TEST_LINUX_MOCK},--wrap=linux_read" CACHE STRING INTERNAL FORCE)
     set(TEST_LINUX_MOCK     "${TEST_LINUX_MOCK},--wrap=fx_write" CACHE STRING INTERNAL FORCE)
     # set(TEST_LINUX_MOCK     "${TEST_LINUX_MOCK},--wrap=linux_close" CACHE STRING INTERNAL FORCE)
     # set(TEST_LINUX_MOCK     "${TEST_LINUX_MOCK},--wrap=linux_fclose" CACHE STRING INTERNAL FORCE)
-    # set(TEST_LINUX_MOCK     "${TEST_LINUX_MOCK},--wrap=linux_fread" CACHE STRING INTERNAL FORCE)
+    set(TEST_LINUX_MOCK     "${TEST_LINUX_MOCK},--wrap=fx_read" CACHE STRING INTERNAL FORCE)
     # set(TEST_LINUX_MOCK     "${TEST_LINUX_MOCK},--wrap=linux_fcntl" CACHE STRING INTERNAL FORCE)
 endif()
 # Mock Linux api.
diff --git a/test/utils/LinuxApiMock/include/LinuxApiMock.h b/test/utils/LinuxApiMock/include/LinuxApiMock.h
index 66e1fd6d..d8efdc93 100644
--- a/test/utils/LinuxApiMock/include/LinuxApiMock.h
+++ b/test/utils/LinuxApiMock/include/LinuxApiMock.h
@@ -45,6 +45,7 @@ using ::testing::Unused;
 using ::testing::WithArgs;
 using ::testing::internal::BuiltInDefaultValue;
 constexpr int INVALID_HANDLE = -1;
+constexpr int MOCK_SELECT_TIME_OUT = 0;
 class LinuxApiMock
 {
 public:
@@ -65,6 +66,8 @@ public:
     virtual int fx_tcgetattr(int fd, struct termios *termios_p);
     virtual int fx_tcsetattr(int fd, int optional_actions, const struct termios *termios_p);
     virtual ssize_t fx_write(int fd, const void *buf, size_t count);
+    virtual ssize_t fx_read(int fd, void *buf, size_t count);
+    virtual int fx_select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout);
 
 public:
     /**
@@ -91,6 +94,8 @@ public:
     MOCK_METHOD2(fx_tcgetattr, int(int, struct termios *));
     MOCK_METHOD3(fx_tcsetattr, int(int, int, const struct termios *));
     MOCK_METHOD3(fx_write, ssize_t(int, const void *, size_t));
+    MOCK_METHOD3(fx_read, ssize_t(int, void *, size_t));
+    MOCK_METHOD5(fx_select, int(int, fd_set *, fd_set *, fd_set *, struct timeval *));
 
 public:
     /**
diff --git a/test/utils/LinuxApiMock/src/LinuxApiMock.cpp b/test/utils/LinuxApiMock/src/LinuxApiMock.cpp
index 3b1fc710..5d1a812d 100644
--- a/test/utils/LinuxApiMock/src/LinuxApiMock.cpp
+++ b/test/utils/LinuxApiMock/src/LinuxApiMock.cpp
@@ -15,13 +15,36 @@
 #include "LinuxApiMock.h"
 #include "ILog.h"
 #include "LinuxTestImpl.h"
-int LinuxApiMock::fx_open(const char *pathname, int flags) { return __real_fx_open(pathname, flags); }
-int LinuxApiMock::fx_tcgetattr(int fd, struct termios *termios_p) { return __real_fx_tcgetattr(fd, termios_p); }
+#include "WrapApi.h"
+int LinuxApiMock::fx_open(const char *pathname, int flags)
+{
+    // LogInfo("Call the real api.\n");
+    return __real_fx_open(pathname, flags);
+}
+int LinuxApiMock::fx_tcgetattr(int fd, struct termios *termios_p)
+{
+    // LogInfo("Call the real api.\n");
+    return __real_fx_tcgetattr(fd, termios_p);
+}
 int LinuxApiMock::fx_tcsetattr(int fd, int optional_actions, const struct termios *termios_p)
 {
     return __real_fx_tcsetattr(fd, optional_actions, termios_p);
 }
-ssize_t LinuxApiMock::fx_write(int fd, const void *buf, size_t count) { return __real_fx_write(fd, buf, count); }
+ssize_t LinuxApiMock::fx_write(int fd, const void *buf, size_t count)
+{
+    // LogInfo("Call the real api.\n");
+    return __real_fx_write(fd, buf, count);
+}
+ssize_t LinuxApiMock::fx_read(int fd, void *buf, size_t count)
+{
+    // LogInfo("Call the real api.\n");
+    return __real_fx_read(fd, buf, count);
+}
+int LinuxApiMock::fx_select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout)
+{
+    // LogInfo("Call the real api.\n");
+    return __real_fx_select(nfds, readfds, writefds, exceptfds, timeout);
+}
 std::shared_ptr<LinuxTest> LinuxTest::CreateLinuxTest(void)
 {
     std::shared_ptr<LinuxTest> test = std::make_shared<LinuxTestImpl>();
diff --git a/test/utils/LinuxApiMock/src/LinuxTestImpl.cpp b/test/utils/LinuxApiMock/src/LinuxTestImpl.cpp
index 6f5f6889..1de75c28 100644
--- a/test/utils/LinuxApiMock/src/LinuxTestImpl.cpp
+++ b/test/utils/LinuxApiMock/src/LinuxTestImpl.cpp
@@ -30,45 +30,67 @@ void LinuxTestImpl::ApiInit(std::shared_ptr<LinuxTest> &mock)
         openFd = __real_fx_open(pathname, flags);
         LogInfo("openFd = %d\n", openFd);
     };
-    static int resultTcgetattr = -1;
-    auto api_tcgetattr = [=](int fd, struct termios *termios_p) {
-        resultTcgetattr = __real_fx_tcgetattr(fd, termios_p);
-        LogInfo("resultTcgetattr = %d\n", resultTcgetattr);
-    };
-    static int resultTcsetattr = -1;
-    auto api_tcsetattr = [=](int fd, int optional_actions, const struct termios *termios_p) {
-        resultTcsetattr = __real_fx_tcsetattr(fd, optional_actions, termios_p);
-        LogInfo("resultTcsetattr = %d\n", resultTcsetattr);
-    };
-    static int writeLength = -1;
-    auto api_write = [=](int fd, const void *buf, size_t count) {
-        writeLength = __real_fx_write(fd, buf, count);
-        LogInfo("writeLength = %d\n", writeLength);
-    };
     EXPECT_CALL(*mock.get(), fx_open(_, _))
         .WillRepeatedly(
             DoAll(Invoke((std::dynamic_pointer_cast<LinuxTestImpl>(mock)).get(), &LinuxTestImpl::ApiLock),
                   WithArgs<0, 1>(Invoke(api_open)),
                   Invoke((std::dynamic_pointer_cast<LinuxTestImpl>(mock)).get(), &LinuxTestImpl::ApiUnlockThread),
                   ReturnPointee(&openFd)));
+    static int resultTcgetattr = -1;
+    auto api_tcgetattr = [=](int fd, struct termios *termios_p) {
+        resultTcgetattr = __real_fx_tcgetattr(fd, termios_p);
+        LogInfo("resultTcgetattr = %d\n", resultTcgetattr);
+    };
     EXPECT_CALL(*mock.get(), fx_tcgetattr(_, _))
         .WillRepeatedly(
             DoAll(Invoke((std::dynamic_pointer_cast<LinuxTestImpl>(mock)).get(), &LinuxTestImpl::ApiLock),
                   WithArgs<0, 1>(Invoke(api_tcgetattr)),
                   Invoke((std::dynamic_pointer_cast<LinuxTestImpl>(mock)).get(), &LinuxTestImpl::ApiUnlockThread),
                   ReturnPointee(&resultTcgetattr)));
+    static int resultTcsetattr = -1;
+    auto api_tcsetattr = [=](int fd, int optional_actions, const struct termios *termios_p) {
+        resultTcsetattr = __real_fx_tcsetattr(fd, optional_actions, termios_p);
+        LogInfo("resultTcsetattr = %d\n", resultTcsetattr);
+    };
     EXPECT_CALL(*mock.get(), fx_tcsetattr(_, _, _))
         .WillRepeatedly(
             DoAll(Invoke((std::dynamic_pointer_cast<LinuxTestImpl>(mock)).get(), &LinuxTestImpl::ApiLock),
                   WithArgs<0, 1, 2>(Invoke(api_tcsetattr)),
                   Invoke((std::dynamic_pointer_cast<LinuxTestImpl>(mock)).get(), &LinuxTestImpl::ApiUnlockThread),
                   ReturnPointee(&resultTcsetattr)));
+    static int writeLength = -1;
+    auto api_write = [=](int fd, const void *buf, size_t count) {
+        writeLength = __real_fx_write(fd, buf, count);
+        LogInfo("writeLength = %d\n", writeLength);
+    };
     EXPECT_CALL(*mock.get(), fx_write(_, _, _))
         .WillRepeatedly(
             DoAll(Invoke((std::dynamic_pointer_cast<LinuxTestImpl>(mock)).get(), &LinuxTestImpl::ApiLock),
                   WithArgs<0, 1, 2>(Invoke(api_write)),
                   Invoke((std::dynamic_pointer_cast<LinuxTestImpl>(mock)).get(), &LinuxTestImpl::ApiUnlockThread),
                   ReturnPointee(&writeLength)));
+    static int readLength = -1;
+    auto api_read = [=](int fd, void *buf, size_t count) {
+        readLength = __real_fx_read(fd, buf, count);
+        LogInfo("readLength = %d\n", readLength);
+    };
+    EXPECT_CALL(*mock.get(), fx_read(_, _, _))
+        .WillRepeatedly(
+            DoAll(Invoke((std::dynamic_pointer_cast<LinuxTestImpl>(mock)).get(), &LinuxTestImpl::ApiLock),
+                  WithArgs<0, 1, 2>(Invoke(api_read)),
+                  Invoke((std::dynamic_pointer_cast<LinuxTestImpl>(mock)).get(), &LinuxTestImpl::ApiUnlockThread),
+                  ReturnPointee(&readLength)));
+    static int selectResult = -1;
+    auto api_select = [=](int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout) {
+        selectResult = __real_fx_select(nfds, readfds, writefds, exceptfds, timeout);
+        LogInfo("selectResult = %d\n", selectResult);
+    };
+    EXPECT_CALL(*mock.get(), fx_select(_, _, _, _, _))
+        .WillRepeatedly(
+            DoAll(Invoke((std::dynamic_pointer_cast<LinuxTestImpl>(mock)).get(), &LinuxTestImpl::ApiLock),
+                  WithArgs<0, 1, 2, 3, 4>(Invoke(api_select)),
+                  Invoke((std::dynamic_pointer_cast<LinuxTestImpl>(mock)).get(), &LinuxTestImpl::ApiUnlockThread),
+                  ReturnPointee(&selectResult)));
 }
 void LinuxTestImpl::Init() {}
 void LinuxTestImpl::UnInit()
diff --git a/test/utils/LinuxApiMock/src/WrapApi.cpp b/test/utils/LinuxApiMock/src/WrapApi.cpp
index ed59201a..546ee1df 100644
--- a/test/utils/LinuxApiMock/src/WrapApi.cpp
+++ b/test/utils/LinuxApiMock/src/WrapApi.cpp
@@ -30,6 +30,11 @@ ssize_t __wrap_fx_write(int fd, const void *buf, size_t count)
 {
     return LinuxApiMock::GetInstance()->fx_write(fd, buf, count);
 }
+ssize_t __wrap_fx_read(int fd, void *buf, size_t count) { return LinuxApiMock::GetInstance()->fx_read(fd, buf, count); }
+int __wrap_fx_select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout)
+{
+    return LinuxApiMock::GetInstance()->fx_select(nfds, readfds, writefds, exceptfds, timeout);
+}
 #ifdef __cplusplus
 }
 #endif
\ No newline at end of file
diff --git a/test/utils/LinuxApiMock/src/WrapApi.h b/test/utils/LinuxApiMock/src/WrapApi.h
index 260fe40c..ced75c54 100644
--- a/test/utils/LinuxApiMock/src/WrapApi.h
+++ b/test/utils/LinuxApiMock/src/WrapApi.h
@@ -14,6 +14,9 @@
  */
 #ifndef WRAP_API_H
 #define WRAP_API_H
+#include <sys/select.h>
+#include <sys/time.h>
+#include <sys/types.h>
 #include <unistd.h>
 #ifdef __cplusplus
 extern "C" {
@@ -23,6 +26,8 @@ int __real_fx_open(const char *pathname, int flags);
 int __real_fx_tcgetattr(int fd, struct termios *termios_p);
 int __real_fx_tcsetattr(int fd, int optional_actions, const struct termios *termios_p);
 ssize_t __real_fx_write(int fd, const void *buf, size_t count);
+ssize_t __real_fx_read(int fd, void *buf, size_t count);
+int __real_fx_select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout);
 #ifdef __cplusplus
 }
 #endif
diff --git a/test/utils/UartDevice/src/UartDevice_Test.cpp b/test/utils/UartDevice/src/UartDevice_Test.cpp
index 68b5ef28..e51da3bc 100644
--- a/test/utils/UartDevice/src/UartDevice_Test.cpp
+++ b/test/utils/UartDevice/src/UartDevice_Test.cpp
@@ -18,11 +18,11 @@
 #include <gtest/gtest.h>
 namespace UartDeviceTest
 {
-// ../output_files/test/bin/UartDeviceTest --gtest_filter=UartDeviceTest.IllegalObject
+// ../output_files/test/bin/UartDeviceTest --gtest_filter=UartDeviceTest.UNIT_UartDevice_AUTO_IllegalObject
 /**
  * UartDevice module api will not crash when object is illegal.
  */
-TEST(UartDeviceTest, IllegalObject)
+TEST(UartDeviceTest, UNIT_UartDevice_AUTO_IllegalObject)
 {
     CreateLogModule();
     ILogInit(LOG_INSTANCE_TYPE_END);
@@ -31,8 +31,8 @@ TEST(UartDeviceTest, IllegalObject)
     IUartRecv(nullptr, nullptr, 0, 0);
     IUartTcflush(nullptr);
     IUartDeviceFree(nullptr);
-    int illegalObject = 0;
-    void *object = &illegalObject;
+    char illegalObject[100] = {0};
+    void *object = &illegalObject[10];
     IUartOpen(object);
     IUartSend(object, nullptr, 0);
     IUartRecv(object, nullptr, 0, 0);
@@ -40,8 +40,8 @@ TEST(UartDeviceTest, IllegalObject)
     IUartDeviceFree(object);
     ILogUnInit();
 }
-// ../output_files/test/bin/UartDeviceTest --gtest_filter=UartDeviceTest.Demo
-TEST(UartDeviceTest, Demo)
+// ../output_files/test/bin/UartDeviceTest --gtest_filter=UartDeviceTest.UNIT_UartDevice_EXAMPLE_Demo
+TEST(UartDeviceTest, UNIT_UartDevice_EXAMPLE_Demo)
 {
     CreateLogModule();
     ILogInit(LOG_INSTANCE_TYPE_END);
diff --git a/test/utils/UartDevice/src_mock/UartDevice_Mock_Test.cpp b/test/utils/UartDevice/src_mock/UartDevice_Mock_Test.cpp
index 5509dd4b..3c72f22b 100644
--- a/test/utils/UartDevice/src_mock/UartDevice_Mock_Test.cpp
+++ b/test/utils/UartDevice/src_mock/UartDevice_Mock_Test.cpp
@@ -55,21 +55,26 @@ public:
         mLinuxTest = std::make_shared<LinuxTest>();
         std::shared_ptr<LinuxApiMock> test = std::make_shared<LinuxApiMock>();
         LinuxApiMock::GetInstance(&test);
+        UnregisterUartDevice(gUartDevice);
     }
 
 public:
     std::shared_ptr<LinuxTest> mLinuxTest;
 };
-// ../output_files/test/bin/UartDeviceTest --gtest_filter=UartDeviceMockTest.UNIT_UartDevice_EXAMPLE_Demo
-TEST_F(UartDeviceMockTest, UNIT_UartDevice_EXAMPLE_Demo)
+// ../output_files/test/bin/UartDeviceTest --gtest_filter=UartDeviceMockTest.UNIT_UartDevice_EXAMPLE_AUTO_Demo
+TEST_F(UartDeviceMockTest, UNIT_UartDevice_EXAMPLE_AUTO_Demo)
 {
     void *object = CreateUartDevice(gUartDevice);
     IUartOpen(object);
     const char *SEND_BUF = "TEST";
     ssize_t sendResult = IUartSend(object, SEND_BUF, strlen(SEND_BUF));
     EXPECT_EQ(sendResult, static_cast<ssize_t>(strlen(SEND_BUF)));
-    // IUartRecv(object, nullptr, 0, 0);
-    // IUartTcflush(object);
+    constexpr int RECV_TIME_OUT_MS = 1000;
+    constexpr int RECV_BUF_LENGTH = 256;
+    char recvBuf[RECV_BUF_LENGTH] = {0};
+    ssize_t recvResult = IUartRecv(object, recvBuf, RECV_BUF_LENGTH, RECV_TIME_OUT_MS);
+    LogInfo("recvResult = %d\n", recvResult);
+    IUartTcflush(object);
     IUartDeviceFree(object);
 }
 // ../output_files/test/bin/UartDeviceTest --gtest_filter=UartDeviceMockTest.UNIT_UartDevice_AUTO_ParameterEarror
@@ -93,6 +98,7 @@ TEST_F(UartDeviceMockTest, UNIT_UartDevice_AUTO_ParameterEarror)
     IUartOpen(object);
     IUartDeviceFree(object);
     EXPECT_EQ(object, nullptr);
+    UnregisterUartDevice(uartDevice);
 }
 // ../output_files/test/bin/UartDeviceTest --gtest_filter=UartDeviceMockTest.UNIT_UartDevice_AUTO_ParameterEarror2
 /**
@@ -137,6 +143,21 @@ TEST_F(UartDeviceMockTest, UNIT_UartDevice_AUTO_WriteAllData)
     EXPECT_EQ(sendResult, static_cast<ssize_t>(strlen(SEND_BUF)));
     IUartDeviceFree(object);
 }
+// ../output_files/test/bin/UartDeviceTest --gtest_filter=UartDeviceMockTest.UNIT_UartDevice_AUTO_RecvData
+TEST_F(UartDeviceMockTest, UNIT_UartDevice_AUTO_RecvData)
+{
+    const char *RECV_BUFF = "TEST";
+    SetRecvApiOnce(mLinuxTest, gUartDevice, (void *)RECV_BUFF, strlen(RECV_BUFF));
+    void *object = CreateUartDevice(gUartDevice);
+    IUartOpen(object);
+    constexpr int RECV_TIME_OUT_MS = 1000;
+    constexpr int RECV_BUF_LENGTH = 256;
+    char recvBuf[RECV_BUF_LENGTH] = {0};
+    ssize_t recvResult = IUartRecv(object, recvBuf, RECV_BUF_LENGTH, RECV_TIME_OUT_MS);
+    EXPECT_EQ(recvResult, static_cast<ssize_t>(strlen(RECV_BUFF)));
+    EXPECT_EQ(0, memcmp(recvBuf, RECV_BUFF, strlen(RECV_BUFF)));
+    IUartDeviceFree(object);
+}
 // ../output_files/test/bin/UartDeviceTest --gtest_filter=UartDeviceMockTest.UNIT_UartDevice_EXAMPLE_MultiThreadTest
 /**
  * @brief Construct a new test f object
diff --git a/test/utils/UartDevice/tool/include/UartDeviceTestTool.h b/test/utils/UartDevice/tool/include/UartDeviceTestTool.h
index daaa88a2..be73c227 100644
--- a/test/utils/UartDevice/tool/include/UartDeviceTestTool.h
+++ b/test/utils/UartDevice/tool/include/UartDeviceTestTool.h
@@ -29,6 +29,12 @@ public:
      * @param uart
      */
     void RegisterUartDevice(std::shared_ptr<LinuxTest> &mock, const uart_info &uart);
+    /**
+     * @brief
+     *
+     * @param uart
+     */
+    void UnregisterUartDevice(const uart_info &uart);
     /**
      * @brief Set the Send Api object
      *
@@ -37,6 +43,15 @@ public:
      * @param length
      */
     void SetSendApiOnce(std::shared_ptr<LinuxTest> &mock, const uart_info &uart, const ssize_t &length);
+    /**
+     * @brief Set the Recv Api Once object
+     *
+     * @param mock
+     * @param uart
+     * @param recvBuff
+     * @param length
+     */
+    void SetRecvApiOnce(std::shared_ptr<LinuxTest> &mock, const uart_info &uart, void *recvBuff, const ssize_t &length);
 
 private:
     std::map<const char *, int> mDeviceMap;
diff --git a/test/utils/UartDevice/tool/src/UartDeviceTestTool.cpp b/test/utils/UartDevice/tool/src/UartDeviceTestTool.cpp
index 2fa0df1d..144851e4 100644
--- a/test/utils/UartDevice/tool/src/UartDeviceTestTool.cpp
+++ b/test/utils/UartDevice/tool/src/UartDeviceTestTool.cpp
@@ -14,6 +14,7 @@
  */
 #include "UartDeviceTestTool.h"
 #include "ILog.h"
+#include <thread>
 static size_t WRITE_COUNT = -1;
 void UartDeviceTestTool::RegisterUartDevice(std::shared_ptr<LinuxTest> &mock, const uart_info &uart)
 {
@@ -30,8 +31,27 @@ void UartDeviceTestTool::RegisterUartDevice(std::shared_ptr<LinuxTest> &mock, co
     EXPECT_CALL(*mock.get(), fx_tcsetattr(uartFd, _, _)).WillRepeatedly(DoAll(Return(TCSETATTR_SUCCEED)));
     EXPECT_CALL(*mock.get(), fx_write(uartFd, _, _))
         .WillRepeatedly(DoAll(SaveArg<2>(&WRITE_COUNT), ReturnPointee(&WRITE_COUNT)));
+    auto selectTimeOut =
+        [=, &mock](int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout) {
+            long long timeMs = timeout->tv_sec * 1000 + timeout->tv_usec / 1000;
+            std::this_thread::sleep_for(std::chrono::milliseconds(timeMs));
+        };
+    EXPECT_CALL(*mock.get(), fx_select(uartFd + 1, _, _, _, _))
+        .WillRepeatedly(DoAll(WithArgs<0, 1, 2, 3, 4>(Invoke(selectTimeOut)), Return(MOCK_SELECT_TIME_OUT)));
+    constexpr int READ_NOTHING = 0;
+    EXPECT_CALL(*mock.get(), fx_read(uartFd, _, _)).WillRepeatedly(DoAll(Return(READ_NOTHING)));
     mDeviceMap[uart.mDevice] = uartFd;
 }
+void UartDeviceTestTool::UnregisterUartDevice(const uart_info &uart)
+{
+    std::map<const char *, int>::iterator iter;
+    iter = mDeviceMap.find(uart.mDevice);
+    if (iter != mDeviceMap.end()) {
+        mDeviceMap.erase(iter);
+        return;
+    }
+    LogError("Can't found the uart device[%s].\n", uart.mDevice);
+}
 void UartDeviceTestTool::SetSendApiOnce(std::shared_ptr<LinuxTest> &mock, const uart_info &uart, const ssize_t &length)
 {
     std::map<const char *, int>::iterator iter;
@@ -43,4 +63,34 @@ void UartDeviceTestTool::SetSendApiOnce(std::shared_ptr<LinuxTest> &mock, const
     EXPECT_CALL(*mock.get(), fx_write(mDeviceMap[uart.mDevice], _, _))
         .WillOnce(DoAll(Return(length)))
         .WillRepeatedly(DoAll(SaveArg<2>(&WRITE_COUNT), ReturnPointee(&WRITE_COUNT)));
+}
+void UartDeviceTestTool::SetRecvApiOnce(std::shared_ptr<LinuxTest> &mock, const uart_info &uart, void *recvBuff,
+                                        const ssize_t &length)
+{
+    std::map<const char *, int>::iterator iter;
+    iter = mDeviceMap.find(uart.mDevice);
+    if (iter == mDeviceMap.end()) {
+        LogError("Can't found the uart device[%s].\n", uart.mDevice);
+        return;
+    }
+    int uartFd = mDeviceMap[uart.mDevice];
+    auto selectSucceed =
+        [=, &mock](int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout) {
+            FD_ZERO(readfds);
+            FD_SET(uartFd, readfds);
+        };
+    auto selectTimeOut =
+        [=, &mock](int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout) {
+            long long timeMs = timeout->tv_sec * 1000 + timeout->tv_usec / 1000;
+            std::this_thread::sleep_for(std::chrono::milliseconds(timeMs));
+        };
+    constexpr int SELECT_READABLE = 1;
+    EXPECT_CALL(*mock.get(), fx_select(uartFd + 1, _, _, _, _))
+        .WillOnce(DoAll(WithArgs<0, 1, 2, 3, 4>(Invoke(selectSucceed)), Return(SELECT_READABLE)))
+        .WillRepeatedly(DoAll(WithArgs<0, 1, 2, 3, 4>(Invoke(selectTimeOut)), Return(MOCK_SELECT_TIME_OUT)));
+    auto readBuf = [=, &mock](int fd, void *buf, size_t count) { memcpy(buf, recvBuff, length); };
+    constexpr int READ_NOTHING = 0;
+    EXPECT_CALL(*mock.get(), fx_read(uartFd, _, _))
+        .WillOnce(DoAll(WithArgs<0, 1, 2>(Invoke(readBuf)), Return(length)))
+        .WillRepeatedly(DoAll(Return(READ_NOTHING)));
 }
\ No newline at end of file
diff --git a/utils/LinuxApi/include/LinuxApi.h b/utils/LinuxApi/include/LinuxApi.h
index c5b5d3c3..b0168e8a 100644
--- a/utils/LinuxApi/include/LinuxApi.h
+++ b/utils/LinuxApi/include/LinuxApi.h
@@ -15,6 +15,9 @@
 #ifndef LINUX_API_H
 #define LINUX_API_H
 #include <stddef.h>
+#include <sys/select.h>
+#include <sys/time.h>
+#include <sys/types.h>
 #include <termios.h>
 #include <unistd.h>
 #ifdef __cplusplus
@@ -25,6 +28,8 @@ int fx_open(const char *pathname, int flags);
 int fx_tcgetattr(int fd, struct termios *termios_p);
 int fx_tcsetattr(int fd, int optional_actions, const struct termios *termios_p);
 ssize_t fx_write(int fd, const void *buf, size_t count);
+ssize_t fx_read(int fd, void *buf, size_t count);
+int fx_select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout);
 #ifdef __cplusplus
 }
 #endif
diff --git a/utils/LinuxApi/src/LinuxApi.c b/utils/LinuxApi/src/LinuxApi.c
index f014cc8a..d49a9087 100644
--- a/utils/LinuxApi/src/LinuxApi.c
+++ b/utils/LinuxApi/src/LinuxApi.c
@@ -29,4 +29,9 @@ int fx_tcsetattr(int fd, int optional_actions, const struct termios *termios_p)
 {
     return tcsetattr(fd, optional_actions, termios_p);
 }
-ssize_t fx_write(int fd, const void *buf, size_t count) { return write(fd, buf, count); }
\ No newline at end of file
+ssize_t fx_write(int fd, const void *buf, size_t count) { return write(fd, buf, count); }
+ssize_t fx_read(int fd, void *buf, size_t count) { return read(fd, buf, count); }
+int fx_select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout)
+{
+    return select(nfds, readfds, writefds, exceptfds, timeout);
+}
\ No newline at end of file
diff --git a/utils/UartDevice/src/UartDeviceImpl.cpp b/utils/UartDevice/src/UartDeviceImpl.cpp
index bf142b8d..6bac8877 100644
--- a/utils/UartDevice/src/UartDeviceImpl.cpp
+++ b/utils/UartDevice/src/UartDeviceImpl.cpp
@@ -22,6 +22,7 @@
 #include <stdio.h>
 #include <sys/types.h>
 #include <termios.h>
+#include <thread>
 #include <unistd.h>
 constexpr int INVALID_FD = -1;
 static const char *UART_DEVICE_NAME = "uart_device";
@@ -61,14 +62,20 @@ const size_t UartDeviceImpl::UartSend(const char *buff, const size_t &buffLength
     return writeTotal;
 }
 const size_t UartDeviceImpl::UartRecv(char *buff, const size_t &buffLength, const unsigned int &timeOutMs,
-                                      const unsigned int delayRead)
+                                      const unsigned int delayReadMs)
 {
     constexpr int RECV_FAILED = -1;
-    int len, fs_sel;
+    int readLength = 0;
+    int fs_sel = -1;
     fd_set fs_read;
     struct timeval time;
 
+    if (nullptr == buff) {
+        LogError("data buff is nullptr.\n");
+        return RECV_FAILED;
+    }
     if (mFd <= 0) {
+        LogError("open uart failed.\n");
         return RECV_FAILED;
     }
 
@@ -76,11 +83,11 @@ const size_t UartDeviceImpl::UartRecv(char *buff, const size_t &buffLength, cons
     FD_SET(mFd, &fs_read);
     time.tv_sec = timeOutMs / 1000;
     time.tv_usec = (timeOutMs % 1000) * 1000;
-    fs_sel = select(mFd + 1, &fs_read, NULL, NULL, &time);
+    fs_sel = fx_select(mFd + 1, &fs_read, NULL, NULL, &time);
     if (fs_sel) {
-        usleep(1000 * delayRead);
-        len = read(mFd, buff, buffLength);
-        return len;
+        std::this_thread::sleep_for(std::chrono::milliseconds(delayReadMs));
+        readLength = fx_read(mFd, buff, buffLength);
+        return readLength;
     }
     return RECV_FAILED;
 }
diff --git a/utils/UartDevice/src/UartDeviceImpl.h b/utils/UartDevice/src/UartDeviceImpl.h
index b6f4bae2..8218d9fe 100644
--- a/utils/UartDevice/src/UartDeviceImpl.h
+++ b/utils/UartDevice/src/UartDeviceImpl.h
@@ -31,7 +31,7 @@ public:
     const StatusCode UartOpen(void);
     const size_t UartSend(const char *buff, const size_t &buffLength);
     const size_t UartRecv(char *buff, const size_t &buffLength, const unsigned int &timeOutMs = 0,
-                          const unsigned int delayRead = 0);
+                          const unsigned int delayReadMs = 0);
     void UartTcflush(void);
 
 private: