diff --git a/pwrapic/test/procapitest.c b/pwrapic/test/procapitest.c
index 5a1ef32d3fab933bf36a5e46b5fe2260684378b2..acd288177f723eb5a789881597c9cf2f738d5559 100644
--- a/pwrapic/test/procapitest.c
+++ b/pwrapic/test/procapitest.c
@@ -28,6 +28,19 @@ static void TEST_PWR_PROC_QueryProcs(void)
     printf("PWR_PROC_QueryProcs. ret: %d num:%d\n", ret, num);
 }
 
+static void TEST_PWR_PROC_QueryProcs_LongKeywords(void)
+{
+    char keywords[PWR_MAX_STRING_LEN] = "/init|";
+    for(int i = 6; i < PWR_MAX_STRING_LEN - 1; ++i)
+    {
+        keywords[i] = 'a';
+    }
+    pid_t procs[TEST_MAX_PROC_NUM] = {0};
+    uint32_t num = TEST_MAX_PROC_NUM;
+    int ret = PWR_PROC_QueryProcs(keywords, procs, &num);
+    printf("PWR_PROC_QueryProcs. ret: %d num:%d\n", ret, num);
+}
+
 static void TEST_PWR_PROC_SetAndGetWattState(void)
 {
     int state = INVALIDE_STATE;
@@ -187,6 +200,7 @@ static void TEST_PWR_PROC_SetServiceState(void)
 void TEST_PROC_AllFunc(void)
 {
     TEST_PWR_PROC_QueryProcs();
+    TEST_PWR_PROC_QueryProcs_LongKeywords();
     TEST_PWR_PROC_SetAndGetWattState();
     TEST_PWR_PROC_SetAndGetWattAttrs();
     TEST_PWR_PROC_AddAndDelWattProcs();
diff --git a/pwrapis/src/procservice.c b/pwrapis/src/procservice.c
index b1c8f3d038e302bc21bb3e5f7ab97cf3df24a5cd..1f8a7c7fcff86c6764bb59314b7f5146a4e50c7a 100644
--- a/pwrapis/src/procservice.c
+++ b/pwrapis/src/procservice.c
@@ -163,12 +163,13 @@ static int ModifyServiceState(const PWR_PROC_ServiceState *sState, const char *s
 
 static int QueryProcs(const char *keyWords, pid_t procs[], int maxNum, int *procNum)
 {
-    char cmd[PWR_MAX_STRING_LEN] = GET_US_PROCS_CMD;
+    char cmd[PWR_MAX_STRING_LEN + sizeof(QUERY_PROCS_CMD)] = GET_US_PROCS_CMD;
     if (keyWords && strlen(keyWords) != 0) {
         if (sprintf(cmd, QUERY_PROCS_CMD, keyWords) < 0) {
             return PWR_ERR_FILE_SPRINTF_FAILED;
         }
     }
+    Logger(DEBUG, MD_NM_SVR_PROC, "QueryProcs: %s", cmd);
     FILE *fp = popen(cmd, "r");
     if (fp == NULL) {
         return PWR_ERR_SYS_EXCEPTION;