diff --git a/oap-server/server-alarm-plugin/src/main/java/org/apache/skywalking/oap/server/core/alarm/provider/RulesReader.java b/oap-server/server-alarm-plugin/src/main/java/org/apache/skywalking/oap/server/core/alarm/provider/RulesReader.java
index 897d892fb..3a511ada5 100644
--- a/oap-server/server-alarm-plugin/src/main/java/org/apache/skywalking/oap/server/core/alarm/provider/RulesReader.java
+++ b/oap-server/server-alarm-plugin/src/main/java/org/apache/skywalking/oap/server/core/alarm/provider/RulesReader.java
@@ -63,7 +63,7 @@ public class RulesReader {
                         alarmRule.setOp((String)settings.get("op"));
                         alarmRule.setPeriod((Integer)settings.getOrDefault("period", 1));
                         alarmRule.setCount((Integer)settings.getOrDefault("count", 1));
-                        alarmRule.setSilencePeriod((Integer)settings.getOrDefault("silence-period", alarmRule.getPeriod()));
+                        alarmRule.setSilencePeriod((Integer)settings.getOrDefault("silence-period", -1));
                         alarmRule.setMessage((String)settings.getOrDefault("message", "Alarm caused by Rule " + alarmRule.getAlarmRuleName()));
 
                         rules.getRules().add(alarmRule);