diff --git a/hutool-core/src/main/java/cn/hutool/core/collection/CollStreamUtil.java b/hutool-core/src/main/java/cn/hutool/core/collection/CollStreamUtil.java
index ab3ef7e9e..f4ef337eb 100644
--- a/hutool-core/src/main/java/cn/hutool/core/collection/CollStreamUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/collection/CollStreamUtil.java
@@ -1,6 +1,7 @@
 package cn.hutool.core.collection;
 
 
+import cn.hutool.core.lang.Opt;
 import cn.hutool.core.map.MapUtil;
 import cn.hutool.core.stream.StreamUtil;
 
@@ -48,7 +49,7 @@ public class CollStreamUtil {
 			return Collections.emptyMap();
 		}
 		return StreamUtil.of(collection, isParallel)
-				.collect(Collectors.toMap(key, Function.identity(), (l, r) -> l));
+				.collect(HashMap::new, (HashMap<K, V> m, V v) -> m.put(Opt.ofNullable(v).map(key).get(), v), HashMap::putAll);
 	}
 
 	/**
diff --git a/hutool-core/src/test/java/cn/hutool/core/collection/CollStreamUtilTest.java b/hutool-core/src/test/java/cn/hutool/core/collection/CollStreamUtilTest.java
index f783adce4..d5c7df566 100644
--- a/hutool-core/src/test/java/cn/hutool/core/collection/CollStreamUtilTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/collection/CollStreamUtilTest.java
@@ -28,6 +28,11 @@ public class CollStreamUtilTest {
 		Assert.assertEquals(map.get(2L).getName(), "李四");
 		Assert.assertEquals(map.get(3L).getName(), "王五");
 		Assert.assertNull(map.get(4L));
+
+		// 测试value为空时
+		list.add(null);
+		map = CollStreamUtil.toIdentityMap(list, Student::getStudentId);
+		Assert.assertNull(map.get(4L));
 	}
 
 	@Test