diff --git a/common/command.py b/common/command.py
index 7949b369042f3f73c2f9744433d151094b7971e2..35dd2712bd88c65e5457a8884d4cbdb1f7ccffef 100644
--- a/common/command.py
+++ b/common/command.py
@@ -194,3 +194,13 @@ class Command:
             else:
                 print("An exception occurred when executing [{}]: {}".format(cmd, err))
             return -1,cmd_result
+
+    @staticmethod
+    def check_pid_exist(pid, flag):
+        check_pid_cmd = "ps -p {}".format(pid)
+        ret, res = Command.private_cmd_run(check_pid_cmd, flag)
+        if ret:
+            return False
+        else:
+            # 存在
+            return True
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