diff --git a/src/main/java/component/Signature.java b/src/main/java/component/Signature.java
index c81173c..429c631 100644
--- a/src/main/java/component/Signature.java
+++ b/src/main/java/component/Signature.java
@@ -10,25 +10,12 @@ import minsecurity.identity.Identity;
  * @Copyright: MIN-Group；国家重大科技基础设施——未来网络北大实验室；深圳市信息论与未来网络重点实验室
  */
 public class Signature {
-    public SignatureInfo getSigInfo() {
-        return sigInfo;
-    }
+    private SignatureInfo sigInfo=new SignatureInfo();
+    private SignatureValue sigValue=new SignatureValue();
 
-    public void setSigInfo(SignatureInfo sigInfo) {
-        this.sigInfo = sigInfo;
+    public Signature(){
     }
 
-    public SignatureValue getSigValue() {
-        return sigValue;
-    }
-
-    public void setSigValue(SignatureValue sigValue) {
-        this.sigValue = sigValue;
-    }
-
-    private SignatureInfo sigInfo;
-    private SignatureValue sigValue;
-
     /**
      * 根据网络身份创建一个 Signature
      * @param identity
@@ -46,4 +33,20 @@ public class Signature {
         this.sigInfo=signatureInfo;
         this.sigValue=signatureValue;
     }
+
+    public SignatureInfo getSigInfo() {
+        return sigInfo;
+    }
+
+    public void setSigInfo(SignatureInfo sigInfo) {
+        this.sigInfo = sigInfo;
+    }
+
+    public SignatureValue getSigValue() {
+        return sigValue;
+    }
+
+    public void setSigValue(SignatureValue sigValue) {
+        this.sigValue = sigValue;
+    }
 }
diff --git a/src/main/java/component/SignatureValue.java b/src/main/java/component/SignatureValue.java
index ddf81c6..4904e82 100644
--- a/src/main/java/component/SignatureValue.java
+++ b/src/main/java/component/SignatureValue.java
@@ -15,6 +15,9 @@ import encoding.*;
 public class SignatureValue implements TlvComponentBase, IEncodingAble {
     private byte[] value;
 
+    public SignatureValue(){
+    }
+
     /**
      * 根据签名值字节数组创建一个 SignatureValue
      * @param value
diff --git a/src/test/java/component/SignatureTest.java b/src/test/java/component/SignatureTest.java
new file mode 100644
index 0000000..a5c27ae
--- /dev/null
+++ b/src/test/java/component/SignatureTest.java
@@ -0,0 +1,21 @@
+package component;
+
+import org.junit.Test;
+
+import java.util.Arrays;
+
+/*
+ * @Author: Wang Feng
+ * @Description:
+ * @Version: 1.0.0
+ * @Date: 20:52 2021/4/1
+ * @Copyright: MIN-Group；国家重大科技基础设施——未来网络北大实验室；深圳市信息论与未来网络重点实验室
+ */
+public class SignatureTest {
+    @Test
+    public void testSignature(){
+        Signature signature=new Signature();
+        System.out.println(signature.getSigInfo().getSignatureType().getValue().getSignatureAlgorithm());
+        System.out.println(Arrays.toString(signature.getSigValue().getValue()));
+    }
+}