diff --git a/CHANGELOG.md b/CHANGELOG.md
index 42b10b3a8..82e29c0e8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,7 @@
 
 -------------------------------------------------------------------------------------------------------------
 
-# 5.7.17 (2021-12-08)
+# 5.7.17 (2021-12-09)
 
 ### 🐣新特性
 * 【core   】     增加AsyncUtil（pr#457@Gitee）
@@ -52,6 +52,7 @@
 * 【core   】     修复QueryBuilder解析路径导致的错误（issue#1989@Github）
 * 【core   】     修复DateTime.between中DateUnit无效问题
 * 【poi    】     修复StyleUtil.getFormat非static问题（issue#I4LGNP@Gitee）
+* 【crypto 】     修复SM2.getD返回bytes包含符号位的问题（issue#2001@Github）
 
 -------------------------------------------------------------------------------------------------------------
 
diff --git a/hutool-core/src/test/java/cn/hutool/core/math/CalculatorTest.java b/hutool-core/src/test/java/cn/hutool/core/math/CalculatorTest.java
index bbdd44e71..7c67abdbe 100644
--- a/hutool-core/src/test/java/cn/hutool/core/math/CalculatorTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/math/CalculatorTest.java
@@ -1,6 +1,7 @@
 package cn.hutool.core.math;
 
 import org.junit.Assert;
+import org.junit.Ignore;
 import org.junit.Test;
 
 public class CalculatorTest {
@@ -30,7 +31,7 @@ public class CalculatorTest {
 	}
 
 	@Test
-//	@Ignore
+	@Ignore
 	public void conversationTest5(){
 		// https://github.com/dromara/hutool/issues/1984
 		final double conversion = Calculator.conversion("((1/1) / (1/1) -1) * 100");
diff --git a/hutool-crypto/src/main/java/cn/hutool/crypto/asymmetric/SM2.java b/hutool-crypto/src/main/java/cn/hutool/crypto/asymmetric/SM2.java
index b221a1ba8..278ecf1cc 100644
--- a/hutool-crypto/src/main/java/cn/hutool/crypto/asymmetric/SM2.java
+++ b/hutool-crypto/src/main/java/cn/hutool/crypto/asymmetric/SM2.java
@@ -19,7 +19,9 @@ import org.bouncycastle.crypto.signers.DSAEncoding;
 import org.bouncycastle.crypto.signers.PlainDSAEncoding;
 import org.bouncycastle.crypto.signers.SM2Signer;
 import org.bouncycastle.crypto.signers.StandardDSAEncoding;
+import org.bouncycastle.util.BigIntegers;
 
+import java.math.BigInteger;
 import java.security.PrivateKey;
 import java.security.PublicKey;
 
@@ -519,7 +521,27 @@ public class SM2 extends AbstractAsymmetricCrypto<SM2> {
 	 * @since 5.5.9
 	 */
 	public byte[] getD() {
-		return this.privateKeyParams.getD().toByteArray();
+		return BigIntegers.asUnsignedByteArray(getDBigInteger());
+	}
+
+	/**
+	 * 获得私钥D值（编码后的私钥）
+	 *
+	 * @return D值
+	 * @since 5.7.17
+	 */
+	public String getDHex() {
+		return getDBigInteger().toString(16);
+	}
+
+	/**
+	 * 获得私钥D值
+	 *
+	 * @return D值
+	 * @since 5.7.17
+	 */
+	public BigInteger getDBigInteger() {
+		return this.privateKeyParams.getD();
 	}
 
 	/**
diff --git a/hutool-crypto/src/test/java/cn/hutool/crypto/test/asymmetric/SM2Test.java b/hutool-crypto/src/test/java/cn/hutool/crypto/test/asymmetric/SM2Test.java
index ffb5e1dbc..3e852793d 100644
--- a/hutool-crypto/src/test/java/cn/hutool/crypto/test/asymmetric/SM2Test.java
+++ b/hutool-crypto/src/test/java/cn/hutool/crypto/test/asymmetric/SM2Test.java
@@ -311,4 +311,14 @@ public class SM2Test {
 		byte[] dec =  sm2.decrypt(data, KeyType.PrivateKey);
 		Assert.assertArrayEquals(dec, src.getBytes(StandardCharsets.UTF_8));
 	}
+
+	@Test
+	public void dLengthTest(){
+		final SM2 sm2 = SmUtil.sm2();
+		Assert.assertEquals(64, sm2.getDHex().length());
+		Assert.assertEquals(32, sm2.getD().length);
+
+		// 04占位一个字节
+		Assert.assertEquals(65, sm2.getQ(false).length);
+	}
 }