diff --git a/CHANGELOG.md b/CHANGELOG.md
index b49ab2c9d..9605617b6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
 
 ### 新特性
 * 【core 】     新增WatchServer（issue#440@Github）
+* 【core 】     ReflectUtil.getFieldValue支持static（issue#662@Github）
 
 
 ### Bug修复
diff --git a/hutool-core/src/main/java/cn/hutool/core/util/ReflectUtil.java b/hutool-core/src/main/java/cn/hutool/core/util/ReflectUtil.java
index 75c09d418..f4f220b11 100644
--- a/hutool-core/src/main/java/cn/hutool/core/util/ReflectUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/util/ReflectUtil.java
@@ -214,13 +214,13 @@ public class ReflectUtil {
 	/**
 	 * 获取字段值
 	 *
-	 * @param obj   对象
+	 * @param obj   对象，static字段则此字段为null
 	 * @param field 字段
 	 * @return 字段值
 	 * @throws UtilException 包装IllegalAccessException异常
 	 */
 	public static Object getFieldValue(Object obj, Field field) throws UtilException {
-		if (null == obj || null == field) {
+		if (null == field) {
 			return null;
 		}
 		setAccessible(field);
@@ -228,7 +228,7 @@ public class ReflectUtil {
 		try {
 			result = field.get(obj);
 		} catch (IllegalAccessException e) {
-			throw new UtilException(e, "IllegalAccess for {}.{}", obj.getClass(), field.getName());
+			throw new UtilException(e, "IllegalAccess for {}.{}", field.getDeclaringClass(), field.getName());
 		}
 		return result;
 	}
@@ -274,13 +274,12 @@ public class ReflectUtil {
 	/**
 	 * 设置字段值
 	 *
-	 * @param obj   对象
+	 * @param obj   对象，如果是static字段，此参数为null
 	 * @param field 字段
 	 * @param value 值，值类型必须与字段类型匹配，不会自动转换对象类型
 	 * @throws UtilException UtilException 包装IllegalAccessException异常
 	 */
 	public static void setFieldValue(Object obj, Field field, Object value) throws UtilException {
-		Assert.notNull(obj);
 		Assert.notNull(field, "Field in [{}] not exist !", obj.getClass().getName());
 
 		setAccessible(field);
diff --git a/hutool-crypto/src/test/java/cn/hutool/crypto/test/SmTest.java b/hutool-crypto/src/test/java/cn/hutool/crypto/test/SmTest.java
index b5a4623f9..0fbdc2179 100644
--- a/hutool-crypto/src/test/java/cn/hutool/crypto/test/SmTest.java
+++ b/hutool-crypto/src/test/java/cn/hutool/crypto/test/SmTest.java
@@ -37,6 +37,18 @@ public class SmTest {
 		Assert.assertEquals(content, decryptStr);
 	}
 
+	@Test
+	public void sm4Test2() {
+		String content = "test中文";
+		SM4 sm4 = new SM4(Mode.CTR, Padding.PKCS5Padding);
+		sm4.setIv("aaaabbbb".getBytes());
+
+		String encryptHex = sm4.encryptHex(content);
+		String decryptStr = sm4.decryptStr(encryptHex, CharsetUtil.CHARSET_UTF_8);
+
+		Assert.assertEquals(content, decryptStr);
+	}
+
 	@Test
 	public void sm4ECBPKCS5PaddingTest2() {
 		String content = "test中文";