diff --git a/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/query/TraceQueryService.java b/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/query/TraceQueryService.java
index f4ea17ebd..696ce84ab 100644
--- a/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/query/TraceQueryService.java
+++ b/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/query/TraceQueryService.java
@@ -382,6 +382,8 @@ public class TraceQueryService implements Service {
             for (Span subSpan : spans) {
                 if (segmentParentSpanId.equals(subSpan.getSegmentSpanId())) {
                     hasParent = true;
+                    // if find parent, quick exit
+                    break;
                 }
             }