diff --git a/mpmaster/src/main/cpp/mpmaster.cpp b/mpmaster/src/main/cpp/mpmaster.cpp
index 54d16081..ebe3f606 100644
--- a/mpmaster/src/main/cpp/mpmaster.cpp
+++ b/mpmaster/src/main/cpp/mpmaster.cpp
@@ -151,35 +151,3 @@ Java_com_xypower_mpmaster_MpMasterService_getSystemProperty(
 
     return env->NewStringUTF(value);
 }
-
-extern "C" JNIEXPORT jboolean JNICALL
-Java_com_xypower_mpmaster_MpMasterService_isMpAppRunning(
-        JNIEnv* env, jclass cls) {
-
-    jboolean res = JNI_FALSE;
-    int fd = open(PATH_MPAPP_RUNNING, O_RDWR, 0444);
-    if (fd != -1)
-    {
-        __android_log_print(ANDROID_LOG_INFO, "MP_TAG", "fd != -1");
-
-        if (flock(fd, LOCK_EX) == 0)
-        {
-            __android_log_print(ANDROID_LOG_INFO, "MP_TAG", "locked");
-
-        } else
-        {
-            __android_log_print(ANDROID_LOG_INFO, "MP_TAG", "can't locked");
-            res = JNI_TRUE;
-        }
-        close(fd);
-        return res;
-    }
-    else
-    {
-        __android_log_print(ANDROID_LOG_INFO, "MP_TAG", "can't open");
-    }
-
-    return JNI_FALSE;
-
-}
-
diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
index c42178d4..28860284 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
@@ -1488,7 +1488,6 @@ public class MpMasterService extends Service {
 
     public native static void rebootDevice();
 
-    public native static boolean isMpAppRunning();
 
     ////////////////////////GPS////////////////////