diff --git a/hugegraph-core/src/main/java/com/baidu/hugegraph/traversal/algorithm/JaccardSimilarTraverser.java b/hugegraph-core/src/main/java/com/baidu/hugegraph/traversal/algorithm/JaccardSimilarTraverser.java
index ba62b24df5..af9f321cb2 100644
--- a/hugegraph-core/src/main/java/com/baidu/hugegraph/traversal/algorithm/JaccardSimilarTraverser.java
+++ b/hugegraph-core/src/main/java/com/baidu/hugegraph/traversal/algorithm/JaccardSimilarTraverser.java
@@ -65,6 +65,9 @@ public double jaccardSimilarity(Id vertex, Id other, Directions dir,
     public double jaccardSimilarity(Set<Id> set1, Set<Id> set2) {
         int interNum = CollectionUtil.intersect(set1, set2).size();
         int unionNum = CollectionUtil.union(set1, set2).size();
+        if (unionNum == 0) {
+            return 0.0D;
+        }
         return (double) interNum / unionNum;
     }