diff --git a/hutool-core/src/main/java/cn/hutool/core/io/file/FileNameUtil.java b/hutool-core/src/main/java/cn/hutool/core/io/file/FileNameUtil.java
index 7cf2d7b40..c2b6c818e 100755
--- a/hutool-core/src/main/java/cn/hutool/core/io/file/FileNameUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/io/file/FileNameUtil.java
@@ -179,6 +179,14 @@ public class FileNameUtil {
 		if (0 == len) {
 			return fileName;
 		}
+
+		//issue#2642，多级扩展名的主文件名
+		for (final CharSequence specialSuffix : SPECIAL_SUFFIX) {
+			if(StrUtil.endWith(fileName, "." + specialSuffix)){
+				return StrUtil.subPre(fileName, len - specialSuffix.length() - 1);
+			}
+		}
+
 		if (CharUtil.isFileSeparator(fileName.charAt(len - 1))) {
 			len--;
 		}
diff --git a/hutool-core/src/test/java/cn/hutool/core/io/file/FileNameUtilTest.java b/hutool-core/src/test/java/cn/hutool/core/io/file/FileNameUtilTest.java
index 706cc4492..344ba754f 100755
--- a/hutool-core/src/test/java/cn/hutool/core/io/file/FileNameUtilTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/io/file/FileNameUtilTest.java
@@ -12,4 +12,10 @@ public class FileNameUtilTest {
 		name = FileNameUtil.cleanInvalid("\r1\r\n2\n");
 		Assert.assertEquals("12", name);
 	}
+
+	@Test
+	public void mainNameTest() {
+		final String s = FileNameUtil.mainName("abc.tar.gz");
+		Assert.assertEquals("abc", s);
+	}
 }