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 1e37b88478..5751204575 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
@@ -90,11 +90,11 @@ public class CheckUtils {
 
   /**
    * check phone
-   *
+   * phone can be empty.
    * @param phone
    */
   public static boolean checkPhone(String phone) {
-    return StringUtils.isNotEmpty(phone) && phone.length() > 18;
+    return StringUtils.isEmpty(phone) || phone.length() <= 11;
   }