diff --git a/sentinel-dashboard/src/main/webapp/resources/app/scripts/controllers/degrade.js b/sentinel-dashboard/src/main/webapp/resources/app/scripts/controllers/degrade.js
index 204c5c01a6..7e9beac5f3 100755
--- a/sentinel-dashboard/src/main/webapp/resources/app/scripts/controllers/degrade.js
+++ b/sentinel-dashboard/src/main/webapp/resources/app/scripts/controllers/degrade.js
@@ -83,6 +83,11 @@ app.controller('DegradeCtl', ['$scope', '$stateParams', 'DegradeService', 'ngDia
       });
     };
 
+    $scope.onGradeChange = function () {
+      $scope.currentRule.count = undefined;
+      $scope.currentRule.slowRatioThreshold = undefined;
+    };
+
     $scope.saveRule = function () {
       if (!DegradeService.checkRuleValid($scope.currentRule)) {
         return;
diff --git a/sentinel-dashboard/src/main/webapp/resources/app/views/dialog/degrade-rule-dialog.html b/sentinel-dashboard/src/main/webapp/resources/app/views/dialog/degrade-rule-dialog.html
index a013762e9e..f9154f7b3d 100755
--- a/sentinel-dashboard/src/main/webapp/resources/app/views/dialog/degrade-rule-dialog.html
+++ b/sentinel-dashboard/src/main/webapp/resources/app/views/dialog/degrade-rule-dialog.html
@@ -32,9 +32,9 @@
 						<label class="col-sm-2 control-label">熔断策略</label>
 						<div class="col-sm-9">
 							<div class="form-control highlight-border" align="center">
-								<input type="radio" name="grade" value="0" checked ng-model='currentRule.grade' title="慢调用比例（1.8.0+ 版本生效）" />&nbsp;慢调用比例&nbsp;&nbsp;
-								<input type="radio" name="grade" value="1" ng-model='currentRule.grade' title="异常比例" />&nbsp;异常比例&nbsp;&nbsp;
-								<input type="radio" name="grade" value="2" ng-model='currentRule.grade' title="异常数" />&nbsp;异常数
+								<input type="radio" name="grade" value="0" checked ng-model='currentRule.grade' ng-change="onGradeChange()" title="慢调用比例（1.8.0+ 版本生效）" />&nbsp;慢调用比例&nbsp;&nbsp;
+								<input type="radio" name="grade" value="1" ng-model='currentRule.grade' ng-change="onGradeChange()" title="异常比例" />&nbsp;异常比例&nbsp;&nbsp;
+								<input type="radio" name="grade" value="2" ng-model='currentRule.grade' ng-change="onGradeChange()" title="异常数" />&nbsp;异常数
 							</div>
 						</div>
 					</div>