diff --git a/advisor/index.go b/advisor/index.go
index a6d33b9ce17edf951507f0239ce90e5dcc5911c6..7d3dd333b658e837611efa4e3f10cb5409870928 100644
--- a/advisor/index.go
+++ b/advisor/index.go
@@ -723,7 +723,7 @@ func (idxAdv *IndexAdvisor) buildIndexWithNoEnv(indexList map[string]map[string]
 // mergeIndex 将索引用到的列去重后合并到一起
 func mergeIndex(idxList map[string]map[string][]*common.Column, column *common.Column) {
 	// 散粒度低于阈值将不会添加索引
-	if common.Config.MinCardinality > column.Cardinality {
+	if common.Config.MinCardinality/100 > column.Cardinality {
 		return
 	}
 
diff --git a/advisor/index_test.go b/advisor/index_test.go
index d1e59265e94cd7a84c16393f7c057530b3aa4ee8..f9f7087e73d92b417a090cb1b2b4d72623e37f04 100644
--- a/advisor/index_test.go
+++ b/advisor/index_test.go
@@ -357,7 +357,8 @@ func TestRuleUpdatePrimaryKey(t *testing.T) {
 
 func TestIndexAdvise(t *testing.T) {
 	common.Log.Debug("Entering function: %s", common.GetFunctionName())
-	// common.Config.MinCardinality = 1
+	minCardinalityBak := common.Config.MinCardinality
+	common.Config.MinCardinality = 20
 	vEnv, rEnv := env.BuildEnv()
 	defer vEnv.CleanUp()
 
@@ -384,6 +385,7 @@ func TestIndexAdvise(t *testing.T) {
 		}
 	}
 	common.Log.Debug("Exiting function: %s", common.GetFunctionName())
+	common.Config.MinCardinality = minCardinalityBak
 }
 
 func TestIndexAdviseNoEnv(t *testing.T) {