diff --git a/sentinel-core/src/main/java/com/alibaba/csp/sentinel/node/StatisticNode.java b/sentinel-core/src/main/java/com/alibaba/csp/sentinel/node/StatisticNode.java
index 14df68bb..a722269a 100755
--- a/sentinel-core/src/main/java/com/alibaba/csp/sentinel/node/StatisticNode.java
+++ b/sentinel-core/src/main/java/com/alibaba/csp/sentinel/node/StatisticNode.java
@@ -213,7 +213,8 @@ public class StatisticNode implements Node {
 
     @Override
     public double maxSuccessQps() {
-        return rollingCounterInSecond.maxSuccess() * rollingCounterInSecond.getSampleCount();
+        return (double) rollingCounterInSecond.maxSuccess() * rollingCounterInSecond.getSampleCount()
+                / rollingCounterInSecond.getWindowIntervalInSec();
     }
 
     @Override