diff --git a/hutool-core/src/test/java/cn/hutool/core/date/LocalDateTimeUtilTest.java b/hutool-core/src/test/java/cn/hutool/core/date/LocalDateTimeUtilTest.java
index f8455b941..ed835e123 100644
--- a/hutool-core/src/test/java/cn/hutool/core/date/LocalDateTimeUtilTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/date/LocalDateTimeUtilTest.java
@@ -177,4 +177,33 @@ public class LocalDateTimeUtilTest {
 		final Week seven = LocalDateTimeUtil.dayOfWeek(LocalDate.of(2021, 9, 26));
 		Assert.assertEquals(Week.SUNDAY, seven);
 	}
+
+	@Test
+	public void isOverlapTest(){
+
+
+		LocalDateTime oneStartTime = LocalDateTime.of(2022, 1, 1, 10, 10, 10);
+		LocalDateTime oneEndTime = LocalDateTime.of(2022, 1, 1, 11, 10, 10);
+
+
+
+		LocalDateTime oneStartTime2 = LocalDateTime.of(2022, 1, 1, 11, 20, 10);
+		LocalDateTime oneEndTime2 = LocalDateTime.of(2022, 1, 1, 11, 30, 10);
+
+
+
+		LocalDateTime oneStartTime3 = LocalDateTime.of(2022, 1, 1, 11, 40, 10);
+		LocalDateTime oneEndTime3 = LocalDateTime.of(2022, 1, 1, 11, 50, 10);
+
+
+
+		//真实请假数据
+		LocalDateTime realStartTime = LocalDateTime.of(2022, 1, 1, 11, 49, 10);
+		LocalDateTime realEndTime = LocalDateTime.of(2022, 1, 1, 12, 0, 10);
+
+		Assert.assertTrue(LocalDateTimeUtil.isOverlap(oneStartTime,oneEndTime,realStartTime,realEndTime));
+		Assert.assertTrue(LocalDateTimeUtil.isOverlap(oneStartTime2,oneEndTime2,realStartTime,realEndTime));
+		Assert.assertFalse(LocalDateTimeUtil.isOverlap(oneStartTime3,oneEndTime3,realStartTime,realEndTime));
+
+	}
 }