diff --git a/br/pkg/restore/split.go b/br/pkg/restore/split.go
index 77db3f8f94e49..d36e85c559219 100644
--- a/br/pkg/restore/split.go
+++ b/br/pkg/restore/split.go
@@ -99,14 +99,6 @@ func (rs *RegionSplitter) Split(
 			maxKey = rule.GetNewKeyPrefix()
 		}
 	}
-	for _, rule := range rewriteRules.Data {
-		if bytes.Compare(minKey, rule.GetNewKeyPrefix()) > 0 {
-			minKey = rule.GetNewKeyPrefix()
-		}
-		if bytes.Compare(maxKey, rule.GetNewKeyPrefix()) < 0 {
-			maxKey = rule.GetNewKeyPrefix()
-		}
-	}
 	interval := SplitRetryInterval
 	scatterRegions := make([]*RegionInfo, 0)
 SplitRegions: