diff --git a/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/utils/CheckUtils.java b/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/utils/CheckUtils.java
index 6c9f714721..a7867f1ba2 100644
--- a/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/utils/CheckUtils.java
+++ b/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/utils/CheckUtils.java
@@ -104,7 +104,7 @@ public class CheckUtils {
    * @return true if phone regex valid, otherwise return false
    */
   public static boolean checkPhone(String phone) {
-    return StringUtils.isEmpty(phone) || phone.length() <= 11;
+    return StringUtils.isEmpty(phone) || phone.length() == 11;
   }