diff --git a/kernel/base/ipc/los_signal.c b/kernel/base/ipc/los_signal.c
index fd5f5817786d931ff4c127678534121445e44ef3..df8bfd537f836dd58bfaa1b466d6853514581a4d 100644
--- a/kernel/base/ipc/los_signal.c
+++ b/kernel/base/ipc/los_signal.c
@@ -215,28 +215,22 @@ void OsSigMaskSwitch(LosTaskCB * const rtcb, sigset_t set)
     }
 }
 
-int OsSigprocMask(int how, const sigset_t_l *setl, sigset_t_l *oldset)
+int OsSigprocMask(int how, const sigset_t_l *setl, sigset_t_l *oldsetl)
 {
     LosTaskCB *spcb = NULL;
-    sigset_t oldSigprocmask;
     int ret = LOS_OK;
     unsigned int intSave;
     sigset_t set;
-    int retVal;
 
-    if (setl != NULL) {
-        retVal = LOS_ArchCopyFromUser(&set, &(setl->sig[0]), sizeof(sigset_t));
-        if (retVal != 0) {
-            return -EFAULT;
-        }
-    }
     SCHEDULER_LOCK(intSave);
     spcb = OsCurrTaskGet();
     /* If requested, copy the old mask to user. */
-    oldSigprocmask = spcb->sig.sigprocmask;
-
+    if (oldsetl != NULL) {
+        *(sigset_t *)oldsetl = spcb->sig.sigprocmask;
+    }
     /* If requested, modify the current signal mask. */
     if (setl != NULL) {
+        set = *(sigset_t *)setl;
         /* Okay, determine what we are supposed to do */
         switch (how) {
             /* Set the union of the current set and the signal
@@ -264,12 +258,6 @@ int OsSigprocMask(int how, const sigset_t_l *setl, sigset_t_l *oldset)
     }
     SCHEDULER_UNLOCK(intSave);
 
-    if (oldset != NULL) {
-        retVal = LOS_ArchCopyToUser(&(oldset->sig[0]), &oldSigprocmask, sizeof(sigset_t));
-        if (retVal != 0) {
-            return -EFAULT;
-        }
-    }
     return ret;
 }
 
diff --git a/syscall/fs_syscall.c b/syscall/fs_syscall.c
index 3e7b921c8fc645d70cd5fc109a4e6397ef4b8279..f3e10416e50bcabe056fe451dc181c81513065d9 100644
--- a/syscall/fs_syscall.c
+++ b/syscall/fs_syscall.c
@@ -2516,37 +2516,36 @@ int SysFstatfs64(int fd, size_t sz, struct statfs *buf)
 
 int SysPpoll(struct pollfd *fds, nfds_t nfds, const struct timespec *tmo_p, const sigset_t *sigMask, int nsig)
 {
-    int timeout;
-    int ret;
-    sigset_t_l origMask;
-    sigset_t_l setl;
-
-    if (sigMask == NULL) {
-        ret = -EINVAL;
-        return ret;
-    }
+    int timeout, retVal;
+    sigset_t_l origMask = {0};
+    sigset_t_l set = {0};
 
     CHECK_ASPACE(tmo_p, sizeof(struct timespec));
-    CHECK_ASPACE(sigMask, sizeof(sigset_t));
     CPY_FROM_USER(tmo_p);
-    CPY_FROM_USER(sigMask);
 
-    timeout = (tmo_p == NULL) ? -1 : (tmo_p->tv_sec * OS_SYS_US_PER_MS + tmo_p->tv_nsec / OS_SYS_NS_PER_MS);
-    if (timeout & 0x80000000) {
-        ret = -EINVAL;
-        return ret;
+    if (tmo_p != NULL) {
+        timeout = tmo_p->tv_sec * OS_SYS_US_PER_MS + tmo_p->tv_nsec / OS_SYS_NS_PER_MS;
+        if (timeout < 0) {
+            return -EINVAL;
+        }
+    } else {
+        timeout = -1;
     }
-    setl.sig[0] = *sigMask;
-    OsSigprocMask(SIG_SETMASK, &setl, &origMask);
-    ret = SysPoll(fds, nfds, timeout);
-    if (ret < 0) {
-        ret = -get_errno();
+
+    if (sigMask != NULL) {
+        retVal = LOS_ArchCopyFromUser(&set, sigMask, sizeof(sigset_t));
+        if (retVal != 0) {
+            return -EFAULT;
+        }
+        (VOID)OsSigprocMask(SIG_SETMASK, &set, &origMask);
+    } else {
+        (VOID)OsSigprocMask(SIG_SETMASK, NULL, &origMask);
     }
-    OsSigprocMask(SIG_SETMASK, &origMask, NULL);
 
-    PointerFree(tmo_pbak);
-    PointerFree(sigMaskbak);
-    return (ret == -1) ? -get_errno() : ret;
+    retVal = SysPoll(fds, nfds, timeout);
+    (VOID)OsSigprocMask(SIG_SETMASK, &origMask, NULL);
+
+    return retVal;
 }
 
 int SysPselect6(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
diff --git a/syscall/ipc_syscall.c b/syscall/ipc_syscall.c
index 628a966c9b5b6d75889c842030f5357d6f8e5862..83ebac4b35124952f5f17106b93af04df41012a2 100644
--- a/syscall/ipc_syscall.c
+++ b/syscall/ipc_syscall.c
@@ -29,6 +29,7 @@
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+#include "syscall_pub.h"
 #include "mqueue.h"
 #include <errno.h>
 #include <sys/types.h>
@@ -36,6 +37,7 @@
 #include "time_posix.h"
 #include "user_copy.h"
 #include "los_signal.h"
+#include "los_process_pri.h"
 #include "los_strncpy_from_user.h"
 #include "fs/file.h"
 
@@ -229,8 +231,14 @@ int SysSigAction(int sig, const sigaction_t *restrict sa, sigaction_t *restrict
 
 int SysSigprocMask(int how, const sigset_t_l *restrict setl, sigset_t_l *restrict oldl, size_t sigsetsize)
 {
-    /* Let nxsig_procmask do all of the work */
-    return OsSigprocMask(how, setl, oldl);
+    CHECK_ASPACE(setl, sizeof(sigset_t_l));
+    CHECK_ASPACE(oldl, sizeof(sigset_t_l));
+    CPY_FROM_USER(setl);
+    CPY_FROM_USER(oldl);
+    /* Let OsSigprocMask do all of the work */
+    int ret = OsSigprocMask(how, setl, oldl);
+    CPY_TO_USER(oldl);
+    return ret;
 }
 
 int SysKill(pid_t pid, int sig)
diff --git a/syscall/syscall_pub.h b/syscall/syscall_pub.h
index e784a51066ee85cbdf7e468c0ad3d7741e54980d..c118662136b436a604f6782823980c54f55d8067 100644
--- a/syscall/syscall_pub.h
+++ b/syscall/syscall_pub.h
@@ -110,7 +110,7 @@ Please deal with the "char *" by function:UserPathCopy.
 #define CPY_FROM_USER(ptr) \
     __typeof(*ptr) ptr##cpy = {0}, *ptr##bak = ptr; \
     if (ptr != NULL) { \
-        if (LOS_ArchCopyFromUser((void*)&ptr##cpy, ptr, sizeof(*ptr)) != 0) { \
+        if (LOS_ArchCopyFromUser((void*)&ptr##cpy, ptr##bak, sizeof(*ptr##bak)) != 0) { \
             set_errno(EFAULT); \
             return -get_errno(); \
         } \
diff --git a/testsuites/unittest/IO/BUILD.gn b/testsuites/unittest/IO/BUILD.gn
index 7eb948e44612a497be83be025109d99276863999..fe03995ab7a2fdaf7c1c0d4de2ba439281ba6e8d 100644
--- a/testsuites/unittest/IO/BUILD.gn
+++ b/testsuites/unittest/IO/BUILD.gn
@@ -85,6 +85,7 @@ sources_full = [
   "full/IO_test_strncasecmp_l_002.cpp",
   "full/IO_test_ppoll_001.cpp",
   "full/IO_test_ppoll_002.cpp",
+  "full/IO_test_ppoll_003.cpp",
   "full/IO_test_pselect_001.cpp",
   "full/IO_test_pselect_002.cpp",
 ]
diff --git a/testsuites/unittest/IO/It_test_IO.h b/testsuites/unittest/IO/It_test_IO.h
index 5c763ca3f60069b69922c652c664c6ddf54c9767..353010d37a3981192d947e7da53325cf48b0b36a 100644
--- a/testsuites/unittest/IO/It_test_IO.h
+++ b/testsuites/unittest/IO/It_test_IO.h
@@ -127,13 +127,12 @@ extern VOID IO_TEST_DCNGETTEXT_002(VOID);
 extern VOID IO_TEST_DCGETTEXT_001(VOID);
 extern VOID IO_TEST_DCGETTEXT_002(VOID);
 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);
 extern VOID IO_TEST_PPOLL_002(VOID);
+extern VOID IO_TEST_PPOLL_003(VOID);
 
 #endif
diff --git a/testsuites/unittest/IO/full/IO_test_ppoll_001.cpp b/testsuites/unittest/IO/full/IO_test_ppoll_001.cpp
index 66d6c06d79169a0317ac642e8068a671756bdf5f..e80b1858d7dc3248f2231550334ef87eec0e9893 100644
--- a/testsuites/unittest/IO/full/IO_test_ppoll_001.cpp
+++ b/testsuites/unittest/IO/full/IO_test_ppoll_001.cpp
@@ -30,143 +30,91 @@
  */
 
 #include "It_test_IO.h"
-#include <poll.h>
-#include "signal.h"
 #include "pthread.h"
 
-#define LISTEN_FD_NUM 10
-#define POLL_EVENTS 1
+const int BUF_SIZE = 128;
+const int DELAY_TIME = 200;
 
-int pipeFdPpoll[LISTEN_FD_NUM][2];
-static pthread_t g_tid = -1;
-extern int ppoll(struct pollfd *fds, nfds_t nfds, const struct timespec *tmo_p, const sigset_t *sigmask);
+static INT32 pipeFdPpoll[2];
+static INT32 g_step = 1;
+static CHAR strBuf[] = "hello world.";
+static struct pollfd pfd;
 
-static void *pthread_01(void)
+static void *pthread_01(void *arg)
 {
-    static int count = 0;
-    int total_num = 0;
-    int times = 3;
-    int i, ret;
-    struct pollfd fds[LISTEN_FD_NUM] = { 0 };
-    char buffer[20];
-    struct timespec t = { 3,0 };
-    sigset_t sigset;
-
-    /* TEST_PRINT("[INFO]%s:%d,%s,Create thread %d\n", __FILE__, __LINE__, __func__, count); */
-    count++;
-
-    sigemptyset(&sigset);
-    sigaddset(&sigset, SIGALRM);    /* 把SIGALRM 信号添加到sigset 信号集中 */
-    sigaddset(&sigset, SIGUSR1);
-
-    for (i = 0; i < LISTEN_FD_NUM; i++) {
-        fds[i].fd = pipeFdPpoll[i][0];
-        fds[i].events = POLL_EVENTS;
+    INT32 retVal;
+    CHAR buf[BUF_SIZE];
+    
+    /* 执行ppoll监视文件描述符 */
+    while (g_step < 3) { /* 3, 3rd step */
+        usleep(DELAY_TIME);
     }
-
-    while (times--) {
-        ret = ppoll(fds, LISTEN_FD_NUM, &t, &sigset);
-        total_num += ((ret > 0) ? ret : 0);
-
-        if (ret <= 0) {
-            continue;
-        }
-
-        for (i = 0; i < LISTEN_FD_NUM; i++) {
-            if (fds[i].revents & POLL_EVENTS) {
-                ret = read(fds[i].fd, buffer, 12);
-                ICUNIT_GOTO_EQUAL(ret, 12, ret, EXIT);
-                ret = strcmp(buffer, "hello world");
-                TEST_PRINT("[EVENT]%s:%d,%s,buffer=%s\n", __FILE__, __LINE__, __func__, buffer);
-            }
-        }
-
-        if (total_num == LISTEN_FD_NUM) {
-            break;
-        }
+    g_step++;
+    retVal = ppoll(&pfd, 1, NULL, NULL);
+    ICUNIT_ASSERT_NOT_EQUAL_NULL(retVal, -1, retVal);
+    
+    while (g_step < 5) { /* 5, 5th step */
+        usleep(DELAY_TIME);
     }
-
-    /* ICUNIT_GOTO_EQUAL(total_num, 10, -1, EXIT); */
-    /* TEST_PRINT("[INFO]%s:%d,%s,total_num=%d\n", __FILE__, __LINE__, __func__, total_num); */
-EXIT:
-    return nullptr;
-}
-
-static UINT32 testcase1(VOID)
-{
-    int i;
-    int ret;
-    int count = 0;
-
-    for (i = 0; i < LISTEN_FD_NUM; i++) {
-        ret = pipe(pipeFdPpoll[i]);
-        ICUNIT_GOTO_EQUAL(ret, 0, ret, EXIT);
-        TEST_PRINT("[INFO]%s:%d,%s,ret=%d,pipeFdPpoll[%d][0]=%d\n", __FILE__, __LINE__, __func__, ret, i, pipeFdPpoll[i][0]);
-        TEST_PRINT("[INFO]%s:%d,%s,ret=%d,pipeFdPpoll[%d][0]=%d\n", __FILE__, __LINE__, __func__, ret, i, pipeFdPpoll[i][1]);
+    g_step++;
+    
+    /* 判断revents */
+    if (pfd.revents & POLLIN) {
+        memset_s(buf, sizeof(buf), 0, sizeof(buf));
+        retVal = read(pfd.fd, buf, BUF_SIZE);
+        ICUNIT_ASSERT_NOT_EQUAL_NULL(retVal, -1, retVal);
+
+        retVal = strcmp(strBuf, buf);
+        ICUNIT_ASSERT_EQUAL_NULL(retVal, 0, retVal);
     }
-
-    errno = 0;
-    ret = pthread_create(&g_tid, nullptr, (void *(*)(void *))pthread_01, nullptr);
-    TEST_PRINT("[INFO]%s:%d,%s,ret=%d,errno=%d,errstr=%s\n", __FILE__, __LINE__, __func__, ret, errno, strerror(errno));
-    ICUNIT_GOTO_EQUAL(ret, 0, ret, EXIT);
-
-    errno = 0;
-    for (i = 0; i < LISTEN_FD_NUM; i++) {
-        if ((pipeFdPpoll[i][1] != 9) && (pipeFdPpoll[i][1] != 10) && (pipeFdPpoll[i][1] != 11)) {
-            ret = write(pipeFdPpoll[i][1], "hello world!", 12); /* 12, "hello world" length and '\0' */
-        }
-        ICUNIT_GOTO_EQUAL(ret, 12, ret, EXIT);
-        TEST_PRINT("[INFO]%s:%d,%s,ret=%d,errno=%d,errstr=%s\n", __FILE__, __LINE__, __func__, ret, errno, strerror(errno));
+    
+    while (g_step < 6) { /* 6, 6th step */
+        usleep(DELAY_TIME);
     }
+    pthread_exit(NULL);
+}
 
-#if 1 /* write looply */
-    while(1) {
-        if (count++ > 3) {
-            break;
-        }
-        sleep(1);
-        for (i = 0; i < LISTEN_FD_NUM; i++) {
-            errno = 0;
-            ret = pthread_create(&g_tid, nullptr, (void *(*)(void *))pthread_01, nullptr);
-            TEST_PRINT("[INFO]%s:%d,%s,ret=%d,errno=%d,errstr=%s\n", __FILE__, __LINE__, __func__, ret, errno, strerror(errno));
-            ICUNIT_GOTO_EQUAL(ret, 0, ret, EXIT);
-
-            if ((pipeFdPpoll[i][1] == 13) || (pipeFdPpoll[i][1] == 14) || (pipeFdPpoll[i][1] == 15)) {
-                errno = 0;
-                ret = write(pipeFdPpoll[i][1], "World HELLO!", 12); /* 12, "hello world" length and '\0' */
-                TEST_PRINT("[INFO]%s:%d,%s,ret=%d,errno=%d,errstr=%s\n", __FILE__, __LINE__, __func__, ret, errno, strerror(errno));
-                TEST_PRINT("[INFO]%s:%d,%s,ret=%d,pipeFdPpoll[%d][1]=%d,count=%d\n", __FILE__, __LINE__, __func__, ret,i, pipeFdPpoll[i][1], count);
-            }
-            /* ICUNIT_GOTO_EQUAL(ret, 12, ret, EXIT); */
-        }
+STATIC UINT32 testcase(VOID)
+{
+    INT32 retVal;
+    pthread_t tid;
+    
+    /* 建立管道 */
+    while (g_step < 1) { /* 1, 1st step */
+        usleep(DELAY_TIME);
     }
-#endif
-
-    pthread_join(g_tid, nullptr);
-
-    for (i = 0; i < LISTEN_FD_NUM; i++) {
-        close(pipeFdPpoll[i][0]);
-        close(pipeFdPpoll[i][1]);
+    retVal = pipe(pipeFdPpoll);
+    ICUNIT_ASSERT_NOT_EQUAL(retVal, -1, retVal);
+    g_step++;
+    
+    /* 设置pfd */
+    pfd.fd = pipeFdPpoll[0];
+    pfd.events = POLLIN;
+    
+    /* 开辟线程执行 ppoll */
+    while (g_step < 2) { /* 2, 2nd step */
+        usleep(DELAY_TIME);
     }
-
-    return LOS_OK;
-
-EXIT:
-    for (i = 0; i < LISTEN_FD_NUM; i++) {
-        close(pipeFdPpoll[i][0]);
-        close(pipeFdPpoll[i][1]);
+    retVal = pthread_create(&tid, NULL, pthread_01, NULL);
+    ICUNIT_ASSERT_EQUAL(retVal, 0, retVal);
+    g_step++;
+    
+    /* 向管道写入数据 */
+    while (g_step < 4) { /* 4, 4th step */
+        usleep(DELAY_TIME);
     }
-    return LOS_NOK;
-}
-
-static UINT32 testcase(VOID)
-{
-    testcase1();
-
+    sleep(1);
+    
+    retVal = write(pipeFdPpoll[1], "hello world.", sizeof(strBuf));
+    ICUNIT_ASSERT_NOT_EQUAL(retVal, -1, retVal);
+    g_step++;
+
+    pthread_join(tid, NULL);
+    
     return LOS_OK;
 }
 
 VOID IO_TEST_PPOLL_001(VOID)
 {
     TEST_ADD_CASE(__FUNCTION__, testcase, TEST_LIB, TEST_LIBC, TEST_LEVEL1, TEST_FUNCTION);
-}
+}
\ No newline at end of file
diff --git a/testsuites/unittest/IO/full/IO_test_ppoll_002.cpp b/testsuites/unittest/IO/full/IO_test_ppoll_002.cpp
index ae52d92710cf69e4a455a1b687223514bb8ddb6c..9f121a79094ad4471551d846b99da72074f10350 100644
--- a/testsuites/unittest/IO/full/IO_test_ppoll_002.cpp
+++ b/testsuites/unittest/IO/full/IO_test_ppoll_002.cpp
@@ -30,83 +30,87 @@
  */
 
 #include "It_test_IO.h"
-#include "time.h"
 #include "signal.h"
-#include <poll.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <strings.h>
+#include "pthread.h"
 
-#define BUF_LEN            20
-#define MAX_SCAN_FDSET     10      /* define poll's listened FD set's size */
-#define POLL_WAIT_TIMEOUT  10*1000 /* ms */
+const int BUF_SIZE = 128;
+const int DELAY_TIME = 200;
 
-extern int ppoll(struct pollfd *fds, nfds_t nfds, const struct timespec *timeout, const sigset_t *sigmask);
-void work_ppoll(int fd)
-{
-    int ret = 0;
-    int i = 0;
-    char recv_buf[BUF_LEN];
-    sigset_t sigset;
-    struct timespec t;
-    struct pollfd scan_fdset[MAX_SCAN_FDSET];
-    int scan_fdset_num = 10;
-    int count = 5;
-
-    bzero(recv_buf, BUF_LEN);
-    sigemptyset(&sigset);
-    sigaddset(&sigset, SIGALRM);        /* add SIGALRM to sigset */
-    sigaddset(&sigset, SIGUSR1);        /* add SIGUSR1 to sigset */
-    bzero(&t, sizeof(struct timespec));
-    t.tv_sec = 10;
-    t.tv_nsec = 0;
-    bzero(scan_fdset, sizeof(struct pollfd) * MAX_SCAN_FDSET);
-    scan_fdset[0].fd = fd;
-
-    /* attention:in the book《UNIX网络编程第一卷》P162 metions:POLLERR,POLLHUP,POLLNVAL\
-       those error signals can not be set in events. */
-    /* they will return in revents,while the proper condition happens. */
-    scan_fdset[0].events = POLLOUT;  /* set the signal needed to be listened:POLLOUT/POLLIN */
+static int pipeFdPpoll[2];
+static int g_step = 1;
+static char strBuf[] = "hello world.";
+static struct pollfd pfd;
 
-    /* set other elements in the array as invalid. */
-    for (i = 1; i < MAX_SCAN_FDSET; i++) {
-        /* scan_fdset[i].fd = -1; */
-        scan_fdset[i].fd = fd;
-        scan_fdset[i].events = POLLOUT;  /* set the signal needed to be listened. */
+static void *pthread_01(void *arg)
+{
+    int retVal;
+    char buf[BUF_SIZE];
+    const struct timespec timeout = {10000, 0};
+    
+    /* 执行ppoll监视文件描述符 */
+    while (g_step < 4) { /* 4, 4th step */
+        usleep(DELAY_TIME);
     }
-    /* scan_fdset_num = 1; */ /* 表示当前的scan_fdset[] 数组中只使用前面1 个元素存放需要监听的扫描符 */
-
-    while (count--) {
-       ret = ppoll(scan_fdset, scan_fdset_num, &t, &sigset);
-
-       for (i = 0; i < MAX_SCAN_FDSET; i++) {
-           if (scan_fdset[i].revents & POLLOUT) {
-               TEST_PRINT("[INFO]%s:%d,%s,fd have signal!\n", __FILE__, __LINE__, __func__);
-               ret = read(fd, recv_buf, BUF_LEN);
-               if (-1 == ret) {
-                   TEST_PRINT("[INFO]%s:%d,%s,read error!\n", __FILE__, __LINE__, __func__);
-                   continue;
-               }
-               TEST_PRINT("[INFO]%s:%d,%s,recv_buf=%s\n", __FILE__, __LINE__, __func__, recv_buf);
-           }
-           TEST_PRINT("[INFO]%s:%d,%s,scan_fdset[i].revents=%d\n", __FILE__, __LINE__, __func__, scan_fdset[i].revents);
-       }
+    g_step++;
+    retVal = ppoll(&pfd, 1, &timeout, NULL);
+    ICUNIT_ASSERT_NOT_EQUAL_NULL(retVal, -1, retVal);
+    
+    /* 判断revents */
+    if (pfd.revents & POLLIN) {
+        memset_s(buf, sizeof(buf), 0, sizeof(buf));
+        retVal = read(pfd.fd, buf, BUF_SIZE);
+        ICUNIT_ASSERT_NOT_EQUAL_NULL(retVal, -1, retVal);
+        retVal = strcmp(strBuf, buf);
+        ICUNIT_ASSERT_EQUAL_NULL(retVal, 0, retVal);
     }
+    
+    while (g_step < 5) { /* 5, 5th step */
+        usleep(DELAY_TIME);
+    }
+    pthread_exit(NULL);
 }
 
 static UINT32 testcase(VOID)
 {
-    int fd;
-    char *filename = FILEPATH_775;
+    int retVal;
+    pthread_t tid;
+    
+    /* 建立管道 */
+    while (g_step < 1) {
+        usleep(DELAY_TIME);
+    }
+    retVal = pipe(pipeFdPpoll);
+    ICUNIT_ASSERT_NOT_EQUAL(retVal, -1, retVal);
+    g_step++;
+    
+    /* 设置pfd */
+    pfd.fd = pipeFdPpoll[0];
+    pfd.events = POLLIN;
+    
+    /* 向管道写入数据 */
+    while (g_step < 2) { /* 2, 2nd step */
+        usleep(DELAY_TIME);
+    }
+    sleep(1);
+    
+    retVal = write(pipeFdPpoll[1], "hello world.", sizeof(strBuf));
+    ICUNIT_ASSERT_NOT_EQUAL(retVal, -1, retVal);
+    g_step++;
 
-    fd = open(filename, O_RDWR);
-    TEST_PRINT("[INFO]%s:%d,%s,fd=%d\n", __FILE__, __LINE__, __func__, fd);
-    work_ppoll(fd);
+    /* 开辟线程执行 ppoll */
+    while (g_step < 3) { /* 3, 3rd step */
+        usleep(DELAY_TIME);
+    }
+    retVal = pthread_create(&tid, NULL, pthread_01, NULL);
+    ICUNIT_ASSERT_EQUAL(retVal, 0, retVal);
+    g_step++;
 
+    pthread_join(tid, NULL);
+    
     return LOS_OK;
 }
 
 VOID IO_TEST_PPOLL_002(VOID)
 {
     TEST_ADD_CASE(__FUNCTION__, testcase, TEST_LIB, TEST_LIBC, TEST_LEVEL1, TEST_FUNCTION);
-}
+}
\ No newline at end of file
diff --git a/testsuites/unittest/IO/full/IO_test_ppoll_003.cpp b/testsuites/unittest/IO/full/IO_test_ppoll_003.cpp
new file mode 100755
index 0000000000000000000000000000000000000000..ea0852f4997d94b1bb9e4c7ec895a81dac962b24
--- /dev/null
+++ b/testsuites/unittest/IO/full/IO_test_ppoll_003.cpp
@@ -0,0 +1,152 @@
+/*
+ * 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 "pthread.h"
+#include "signal.h"
+
+const int BUF_SIZE = 128;
+const int DELAY_TIME = 200;
+
+static INT32 pipeFdPpoll[2];
+static INT32 g_step = 1;
+static CHAR strBuf[] = "hello world.";
+static struct pollfd pfd;
+static sigset_t sigMask;
+static UINT32 count = 0;
+
+static void signalHandle(INT32 sigNum)
+{
+    g_step++;
+    return;
+}
+
+static void *pthread_01(void *arg)
+{
+    INT32 retVal;
+    CHAR buf[BUF_SIZE];
+
+    (void)signal(SIGUSR1, signalHandle);
+
+    while (1) {
+        /* 执行ppoll监视文件描述符 */
+        while (g_step < 2) { /* 2, 2nd step */
+            usleep(DELAY_TIME);
+        }
+        g_step++;
+        retVal = ppoll(&pfd, 1, NULL, &sigMask);
+
+        ICUNIT_ASSERT_NOT_EQUAL_NULL(retVal, -1, retVal);
+        
+        /* 判断revents */
+        if (pfd.revents & POLLIN) {
+            memset_s(buf, sizeof(buf), 0, sizeof(buf));
+            retVal = read(pfd.fd, buf, BUF_SIZE);
+            ICUNIT_ASSERT_NOT_EQUAL_NULL(retVal, -1, retVal);
+
+            retVal = strcmp(strBuf, buf);
+            ICUNIT_ASSERT_EQUAL_NULL(retVal, 0, retVal);
+
+            count++;
+        } else {
+            ICUNIT_ASSERT_NOT_EQUAL_NULL(pfd.revents & POLLIN, 0, pfd.revents & POLLIN);
+        }
+        g_step++;
+        
+        if (g_step >= 7) { /* 7, 7th step */
+            ICUNIT_ASSERT_EQUAL_NULL(count, 2, count); /* 2, 2nd step */
+            pthread_exit(NULL);
+        }
+    }
+
+    return LOS_OK;
+}
+
+static UINT32 testcase(VOID)
+{
+    INT32 retVal;
+    pthread_t tid;
+
+    /* 建立管道 */
+    while (g_step < 1) {
+        usleep(DELAY_TIME);
+    }
+    retVal = pipe(pipeFdPpoll);
+    ICUNIT_ASSERT_NOT_EQUAL(retVal, -1, retVal);
+    
+    /* 设置pfd sigmask */
+    pfd.fd = pipeFdPpoll[0];
+    pfd.events = POLLIN;
+    pfd.revents = 0x0;
+
+    sigemptyset(&sigMask);
+    sigaddset(&sigMask, SIGUSR1);
+
+    /* 开辟线程执行 ppoll */
+    retVal = pthread_create(&tid, NULL, pthread_01, NULL);
+    ICUNIT_ASSERT_EQUAL(retVal, 0, retVal);
+    g_step++;
+
+    /* 向管道写入数据 */
+    while (g_step < 3) { /* 3, 3ed step */
+        usleep(DELAY_TIME);
+    }
+    sleep(1); /* 保证先挂起再写入数据 */
+    retVal = write(pipeFdPpoll[1], "hello world.", sizeof(strBuf));
+    ICUNIT_ASSERT_NOT_EQUAL(retVal, -1, retVal);
+
+    /* 向线程发送信号 */
+    while (g_step < 5) { /* 5, 5th step */
+        usleep(DELAY_TIME);
+    }
+    sleep(1); /* 保证先挂起再发送信号 */
+    retVal = pthread_kill(tid, SIGUSR1);
+    ICUNIT_ASSERT_EQUAL(retVal, 0, retVal);
+
+    /* 继续向管道写入数据 */
+    ICUNIT_ASSERT_EQUAL(g_step, 5, g_step);    /* 5, sth。判断挂起解除之前信号没有被处理 */
+    retVal = write(pipeFdPpoll[1], "hello world.", sizeof(strBuf));
+    ICUNIT_ASSERT_NOT_EQUAL(retVal, -1, retVal);
+
+    while (g_step < 7) { /* 7, 7th step */
+        usleep(DELAY_TIME);
+    }
+    ICUNIT_ASSERT_EQUAL(count, 2, count); /* 2, 2nd step */
+    /* 等待退出 */
+    pthread_join(tid, NULL);
+
+    return LOS_OK;
+}
+
+VOID IO_TEST_PPOLL_003(VOID)
+{
+    TEST_ADD_CASE(__FUNCTION__, testcase, TEST_LIB, TEST_LIBC, TEST_LEVEL1, TEST_FUNCTION);
+}
\ No newline at end of file
diff --git a/testsuites/unittest/IO/io_test.cpp b/testsuites/unittest/IO/io_test.cpp
index 5b8f668d8ca2608f2cf16f2e2e988eae7afc00f4..cda694752160b4b91f658bc68c63021f34026ca9 100644
--- a/testsuites/unittest/IO/io_test.cpp
+++ b/testsuites/unittest/IO/io_test.cpp
@@ -137,6 +137,17 @@ HWTEST_F(IoTest, IO_TEST_PPOLL_002, TestSize.Level0)
     IO_TEST_PPOLL_002();
 }
 
+/* *
+ * @tc.name: IO_TEST_PPOLL_003
+ * @tc.desc: function for IoTest
+ * @tc.type: FUNC
+ * @tc.require: AR000EEMQ9
+ */
+HWTEST_F(IoTest, IO_TEST_PPOLL_003, TestSize.Level0)
+{
+    IO_TEST_PPOLL_003();
+}
+
 /* *
  * @tc.name: IT_STDLIB_POLL_002
  * @tc.desc: function for IoTest