diff --git a/hutool-core/src/main/java/cn/hutool/core/util/IdcardUtil.java b/hutool-core/src/main/java/cn/hutool/core/util/IdcardUtil.java
index 99f3137b65b47e2b0735f12e7e5a1be3ee7b7212..eef84ac73591744928ae6a58bdd09c3ebbc51746 100755
--- a/hutool-core/src/main/java/cn/hutool/core/util/IdcardUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/util/IdcardUtil.java
@@ -271,7 +271,7 @@ public class IdcardUtil {
 	 * @since 5.5.7
 	 */
 	public static boolean isValidCard18(String idcard, boolean ignoreCase) {
-		if (CHINA_ID_MAX_LENGTH != idcard.length()) {
+		if (StrUtil.isBlank(idcard) || CHINA_ID_MAX_LENGTH != idcard.length()) {
 			return false;
 		}
 
@@ -304,7 +304,7 @@ public class IdcardUtil {
 	 * @return 是否合法
 	 */
 	public static boolean isValidCard15(String idcard) {
-		if (CHINA_ID_MIN_LENGTH != idcard.length()) {
+		if (StrUtil.isBlank(idcard) || CHINA_ID_MIN_LENGTH != idcard.length()) {
 			return false;
 		}
 		if (ReUtil.isMatch(PatternPool.NUMBERS, idcard)) {
@@ -407,6 +407,9 @@ public class IdcardUtil {
 	 * @return 验证码是否符合
 	 */
 	public static boolean isValidHKCard(String idcard) {
+		if (StrUtil.isBlank(idcard)) {
+			return false;
+		}
 		String card = idcard.replaceAll("[()]", "");
 		int sum;
 		if (card.length() == 9) {
diff --git a/hutool-core/src/test/java/cn/hutool/core/util/IdcardUtilTest.java b/hutool-core/src/test/java/cn/hutool/core/util/IdcardUtilTest.java
index 2e38992f7c804bcae4ab488555a134186a8aa8fa..aa6a3a8b5b4efc8790c9b27779bd1b4fda94d144 100644
--- a/hutool-core/src/test/java/cn/hutool/core/util/IdcardUtilTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/util/IdcardUtilTest.java
@@ -127,6 +127,10 @@ public class IdcardUtilTest {
 		// 台湾人在大陆身份证
 		isValidCard18 = IdcardUtil.isValidCard18("830000200209060065");
 		Assert.assertTrue(isValidCard18);
+
+		// 身份证允许调用为空null
+		isValidCard18 = !IdcardUtil.isValidCard18(null);
+		Assert.assertTrue(isValidCard18);
 	}
 
 	@Test