diff --git a/hutool-core/src/main/java/cn/hutool/core/map/ReferenceConcurrentMap.java b/hutool-core/src/main/java/cn/hutool/core/map/ReferenceConcurrentMap.java
index 99e80a877..cc5ba04f8 100755
--- a/hutool-core/src/main/java/cn/hutool/core/map/ReferenceConcurrentMap.java
+++ b/hutool-core/src/main/java/cn/hutool/core/map/ReferenceConcurrentMap.java
@@ -177,6 +177,7 @@ public class ReferenceConcurrentMap<K, V> implements ConcurrentMap<K, V>, Iterab
 
 	@Override
 	public Set<K> keySet() {
+		this.purgeStaleKeys();
 		// TODO 非高效方式的set转换，应该返回一个view
 		final Collection<K> trans = CollUtil.trans(this.raw.keySet(), (reference) -> null == reference ? null : reference.get());
 		return new HashSet<>(trans);