diff --git a/syscall/fs_syscall.c b/syscall/fs_syscall.c
index 99dedeca..3e7b921c 100644
--- a/syscall/fs_syscall.c
+++ b/syscall/fs_syscall.c
@@ -2548,4 +2548,51 @@ int SysPpoll(struct pollfd *fds, nfds_t nfds, const struct timespec *tmo_p, cons
     PointerFree(sigMaskbak);
     return (ret == -1) ? -get_errno() : ret;
 }
+
+int SysPselect6(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
+    const struct timespec *timeout, const long data[2])
+{
+    int ret;
+    int retVal;
+    sigset_t_l origMask;
+    sigset_t_l setl;
+
+    CHECK_ASPACE(readfds, sizeof(fd_set));
+    CHECK_ASPACE(writefds, sizeof(fd_set));
+    CHECK_ASPACE(exceptfds, sizeof(fd_set));
+    CHECK_ASPACE(timeout, sizeof(struct timeval));
+
+    CPY_FROM_USER(readfds);
+    CPY_FROM_USER(writefds);
+    CPY_FROM_USER(exceptfds);
+    DUP_FROM_USER(timeout, sizeof(struct timeval));
+
+    ((struct timeval *)timeout)->tv_usec = timeout->tv_nsec / 1000; /* 1000, convert ns to us */
+
+    if (data != NULL) {
+        retVal = LOS_ArchCopyFromUser(&(setl.sig[0]), (int *)data[0], sizeof(sigset_t));
+        if (retVal != 0) {
+            ret = -EFAULT;
+            FREE_DUP(timeout);
+            return ret;
+        }
+    }
+
+    OsSigprocMask(SIG_SETMASK, &setl, &origMask);
+    ret = do_select(nfds, readfds, writefds, exceptfds, (struct timeval *)timeout, UserPoll);
+    if (ret < 0) {
+        /* do not copy parameter back to user mode if do_select failed */
+        ret = -get_errno();
+        FREE_DUP(timeout);
+        return ret;
+    }
+    OsSigprocMask(SIG_SETMASK, &origMask, NULL);
+
+    CPY_TO_USER(readfds);
+    CPY_TO_USER(writefds);
+    CPY_TO_USER(exceptfds);
+    FREE_DUP(timeout);
+
+    return ret;
+}
 #endif
diff --git a/syscall/los_syscall.h b/syscall/los_syscall.h
index 106472cb..f50754b7 100644
--- a/syscall/los_syscall.h
+++ b/syscall/los_syscall.h
@@ -257,6 +257,8 @@ extern int SysIoctl(int fd, int req, void *arg);
 extern int SysFcntl(int fd, int cmd, void *arg);
 extern int SysDup2(int fd1, int fd2);
 extern int SysSelect(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout);
+extern int SysPselect6(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
+                    const struct timespec *timeout, const long data[2]);
 extern int SysTruncate(const char *path, off_t length);
 extern int SysFtruncate(int fd, off_t length);
 extern int SysStatfs(const char *path, struct statfs *buf);
diff --git a/syscall/syscall_lookup.h b/syscall/syscall_lookup.h
index da1ca1a7..559cb0b5 100644
--- a/syscall/syscall_lookup.h
+++ b/syscall/syscall_lookup.h
@@ -83,6 +83,7 @@ SYSCALL_HAND_DEF(__NR_fstatat64, SysFstatat64, int, ARG_NUM_4)
 SYSCALL_HAND_DEF(__NR_fsync, SysFsync, int, ARG_NUM_1)
 SYSCALL_HAND_DEF(__NR__llseek, SysLseek64, off64_t, ARG_NUM_5) /* current only support 32bit max 4G file */
 SYSCALL_HAND_DEF(__NR__newselect, SysSelect, int, ARG_NUM_5)
+SYSCALL_HAND_DEF(__NR_pselect6, SysPselect6, int, ARG_NUM_6)
 SYSCALL_HAND_DEF(__NR_readv, SysReadv, ssize_t, ARG_NUM_3)
 SYSCALL_HAND_DEF(__NR_writev, SysWritev, ssize_t, ARG_NUM_3)
 SYSCALL_HAND_DEF(__NR_poll, SysPoll, int, ARG_NUM_3)
diff --git a/testsuites/unittest/IO/BUILD.gn b/testsuites/unittest/IO/BUILD.gn
index e9095106..7eb948e4 100644
--- a/testsuites/unittest/IO/BUILD.gn
+++ b/testsuites/unittest/IO/BUILD.gn
@@ -85,6 +85,8 @@ sources_full = [
   "full/IO_test_strncasecmp_l_002.cpp",
   "full/IO_test_ppoll_001.cpp",
   "full/IO_test_ppoll_002.cpp",
+  "full/IO_test_pselect_001.cpp",
+  "full/IO_test_pselect_002.cpp",
 ]
 
 if (LOSCFG_USER_TEST_LEVEL >= TEST_LEVEL_LOW) {
diff --git a/testsuites/unittest/IO/It_test_IO.h b/testsuites/unittest/IO/It_test_IO.h
index c64683df..5c763ca3 100644
--- a/testsuites/unittest/IO/It_test_IO.h
+++ b/testsuites/unittest/IO/It_test_IO.h
@@ -130,6 +130,7 @@ extern VOID IO_TEST_GETTEXT_001(VOID);
 extern VOID IO_TEST_PPOLL_001(void);
 extern VOID IO_TEST_PPOLL_002(void);
 extern VOID IO_TEST_PSELECT_001(void);
+extern VOID IO_TEST_PSELECT_002(void);
 extern VOID IO_TEST_STRFMON_L_001(VOID);
 extern VOID IO_TEST_STRFMON_L_002(VOID);
 extern VOID IO_TEST_PPOLL_001(VOID);
diff --git a/testsuites/unittest/IO/full/IO_test_pselect_001.cpp b/testsuites/unittest/IO/full/IO_test_pselect_001.cpp
index 8cfbe3f5..d6cfa95d 100644
--- a/testsuites/unittest/IO/full/IO_test_pselect_001.cpp
+++ b/testsuites/unittest/IO/full/IO_test_pselect_001.cpp
@@ -36,34 +36,85 @@
 #include <unistd.h>
 #include "sys/select.h"
 
+static UINT32 Testcase1(VOID)
+{
+    static const int TAR_STR_LEN = 12; /* 12, str len */
+    int pipeFd[2], ret; /* 2, pipe return 2 file descirpter */
+    fd_set reads;
+    ret = pipe(pipeFd);
+    ICUNIT_GOTO_EQUAL(ret, 0, ret, EXIT);
+    ret = write(pipeFd[1], "Hello World", TAR_STR_LEN);
+    ICUNIT_GOTO_EQUAL(ret, TAR_STR_LEN, ret, EXIT);
+    FD_ZERO(&reads);
+    FD_SET(pipeFd[0], &reads);
+    ret = select(pipeFd[0] + 1, &reads, nullptr, nullptr, nullptr);
+    ICUNIT_GOTO_EQUAL(ret, 1, ret, EXIT);
+    ret = FD_ISSET(pipeFd[0], &reads);
+    ICUNIT_GOTO_NOT_EQUAL(ret, 0, ret, EXIT);
+    close(pipeFd[0]);
+    close(pipeFd[1]);
+    return LOS_OK;
+EXIT:
+    close(pipeFd[0]);
+    close(pipeFd[1]);
+    return LOS_NOK;
+}
+
+#define V_SIGMASK   0x5555
 static UINT32 testcase(VOID)
 {
     fd_set rfds;
-    //struct timeval tv;
     struct timespec tv;
     int retval;
+    pid_t pid;
+    int pipeFd[2]; /* 2, pipe id num */
+    char buffer[40]; /* 40, buffer size */
+    int i = 0;
+    int status;
 
-    /* Watch stdin (fd 0) to see when it has input. */
+    sigset_t mask;
+
+    retval = Testcase1(); /* first check select works */
+    ICUNIT_GOTO_EQUAL(retval, 0, retval, OUT);
+
+    retval = pipe(pipeFd);
+    ICUNIT_GOTO_EQUAL(retval, 0, retval, OUT);
+
+    /* Watch fd to see when it has input. */
     FD_ZERO(&rfds);
-    FD_SET(0, &rfds);
+    FD_SET(pipeFd[0], &rfds);
 
     /* Wait up to three seconds. */
-    //tv.tv_sec = 3;
-    //tv.tv_usec = 0;
-    tv.tv_sec = 3;
-    tv.tv_nsec = 0;
+    tv.tv_sec = 3; /* 3, wait timer, second */
+    tv.tv_nsec = 5; /* 5, wait timer, nano second */
 
-    retval = pselect(1, &rfds, nullptr, nullptr, &tv, ((long[]){ 0, _NSIG/8 }));
+    pid = fork();
+    if (pid == 0) {
+        close(pipeFd[1]);
 
-    if (retval == -1) {
-       perror("select()");
-    } else if (retval) {
-        printf("Data is available now.\n");
-    } else { /* FD_ISSET(0, &rfds) will be true. */
-       printf("No data within three seconds.\n");
+        retval = pselect(pipeFd[0] + 1, &rfds, nullptr, nullptr, &tv, &mask);
+        close(pipeFd[0]);
+
+        if (retval) {
+            exit(LOS_OK);
+        } else {
+            exit(LOS_NOK);
+        }
+    } else {
+        sleep(1);
+        close(pipeFd[0]);
+        retval = write(pipeFd[1], "0123456789012345678901234567890123456789", 40); /* write 40 bytes to stdin(fd 0) */
+        ICUNIT_GOTO_EQUAL(retval, 40, retval, OUT);
+        close(pipeFd[1]);
+
+        wait(&status);
+        status = WEXITSTATUS(status);
+        ICUNIT_ASSERT_EQUAL(status, LOS_OK, status);
     }
 
     return LOS_OK;
+OUT:
+    return LOS_NOK;
 }
 
 VOID IO_TEST_PSELECT_001(VOID)
diff --git a/testsuites/unittest/IO/full/IO_test_pselect_002.cpp b/testsuites/unittest/IO/full/IO_test_pselect_002.cpp
new file mode 100644
index 00000000..bf2148b8
--- /dev/null
+++ b/testsuites/unittest/IO/full/IO_test_pselect_002.cpp
@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
+ * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this list of
+ *    conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *    of conditions and the following disclaimer in the documentation and/or other materials
+ *    provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without specific prior written
+ *    permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "It_test_IO.h"
+#include <stdlib.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include "sys/select.h"
+
+static void SigPrint(int sig)
+{
+    return;
+}
+
+static UINT32 testcase(VOID)
+{
+    fd_set rfds;
+    struct timespec tv;
+    int retval;
+    pid_t pid;
+    int pipeFd[2]; /* 2, pipe id num */
+    char buffer[40]; /* 40, buffer size */
+
+    int i = 0;
+    int status;
+
+    void (*retSig)(int);
+    sigset_t mask;
+
+    retSig = signal(SIGALRM, SigPrint);
+    ICUNIT_ASSERT_NOT_EQUAL(retSig, NULL, retSig);
+
+    retSig = signal(SIGUSR1, SigPrint);
+    ICUNIT_ASSERT_NOT_EQUAL(retSig, NULL, retSig);
+
+    retval = sigemptyset(&mask);
+    ICUNIT_ASSERT_EQUAL(retval, 0, retval);
+
+    retval = sigaddset(&mask, SIGALRM);
+    ICUNIT_ASSERT_EQUAL(retval, 0, retval);
+
+    retval = sigaddset(&mask, SIGUSR1);
+    ICUNIT_ASSERT_EQUAL(retval, 0, retval);
+
+    retval = pipe(pipeFd);
+    ICUNIT_GOTO_EQUAL(retval, 0, retval, OUT);
+
+    /* Watch fd to see when it has input. */
+    FD_ZERO(&rfds);
+    FD_SET(pipeFd[0], &rfds);
+
+    /* Wait up to three seconds. */
+    tv.tv_sec = 3; /* 3, wait timer, second */
+    tv.tv_nsec = 5; /* 5, wait timer, nano second */
+
+    pid = fork();
+    if (pid == 0) {
+        close(pipeFd[1]);
+
+        retval = pselect(pipeFd[0] + 1, &rfds, nullptr, nullptr, &tv, &mask);
+
+        close(pipeFd[0]);
+
+        if (retval != 0) {
+            exit(LOS_OK);
+        } else {
+            exit(LOS_NOK);
+        }
+    } else {
+        sleep(1);
+        close(pipeFd[0]);
+
+        retval = kill(pid, SIGALRM);
+        ICUNIT_ASSERT_EQUAL(retval, 0, retval);
+
+        retval = kill(pid, SIGUSR1);
+        ICUNIT_ASSERT_EQUAL(retval, 0, retval);
+        close(pipeFd[1]);
+
+        wait(&status);
+        status = WEXITSTATUS(status);
+        ICUNIT_ASSERT_EQUAL(status, LOS_OK, status);
+    }
+
+    return LOS_OK;
+OUT:
+    return LOS_NOK;
+}
+
+VOID IO_TEST_PSELECT_002(VOID)
+{
+    TEST_ADD_CASE(__FUNCTION__, testcase, TEST_LIB, TEST_LIBC, TEST_LEVEL1, TEST_FUNCTION);
+}
+
diff --git a/testsuites/unittest/IO/io_test.cpp b/testsuites/unittest/IO/io_test.cpp
index 1556beb4..5b8f668d 100644
--- a/testsuites/unittest/IO/io_test.cpp
+++ b/testsuites/unittest/IO/io_test.cpp
@@ -93,6 +93,28 @@ HWTEST_F(IoTest, ItTestIo013, TestSize.Level0)
 #endif
 
 #if defined(LOSCFG_USER_TEST_FULL)
+/* *
+ * @tc.name: IO_TEST_PSELECT_001
+ * @tc.desc: function for IoTest
+ * @tc.type: FUNC
+ * @tc.require: AR000EEMQ9
+ */
+HWTEST_F(IoTest, IO_TEST_PSELECT_001, TestSize.Level0)
+{
+    IO_TEST_PSELECT_001();
+}
+
+/* *
+ * @tc.name: IO_TEST_PSELECT_002
+ * @tc.desc: function for IoTest
+ * @tc.type: FUNC
+ * @tc.require: AR000EEMQ9
+ */
+HWTEST_F(IoTest, IO_TEST_PSELECT_002, TestSize.Level0)
+{
+    IO_TEST_PSELECT_002();
+}
+
 /* *
  * @tc.name: IO_TEST_PPOLL_001
  * @tc.desc: function for IoTest