diff --git a/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/ClassConstructorInterceptor.java b/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/ClassConstructorInterceptor.java
index 10b2cf445..34563d0ea 100644
--- a/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/ClassConstructorInterceptor.java
+++ b/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/ClassConstructorInterceptor.java
@@ -24,21 +24,14 @@ public class ClassConstructorInterceptor {
 			@FieldProxy(EnhanceClazz4Interceptor.contextAttrName) FieldSetter accessor,
 			@AllArguments Object[] allArguments) {
 		try {
-			accessor.setValue(new EnhancedClassInstanceContext());
+			EnhancedClassInstanceContext context = new EnhancedClassInstanceContext();
+			accessor.setValue(context);
 			ConstructorContext interceptorContext = new ConstructorContext(
 					allArguments);
-			interceptor.onConstruct(null, interceptorContext);
+			interceptor.onConstruct(context, interceptorContext);
 		} catch (Throwable t) {
 			logger.error("ClassConstructorInterceptor failue.", t);
 		}
 
 	}
-	
-	public interface FieldGetter {
-		Object getValue();
-	}
-
-	public interface FieldSetter {
-		void setValue(Object value);
-	}
 }
diff --git a/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/EnhanceClazz4Interceptor.java b/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/EnhanceClazz4Interceptor.java
index e4116fcbb..d9c3a5e5f 100644
--- a/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/EnhanceClazz4Interceptor.java
+++ b/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/EnhanceClazz4Interceptor.java
@@ -19,8 +19,6 @@ import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
 import com.ai.cloud.skywalking.plugin.PluginCfg;
-import com.ai.cloud.skywalking.plugin.interceptor.ClassConstructorInterceptor.FieldGetter;
-import com.ai.cloud.skywalking.plugin.interceptor.ClassConstructorInterceptor.FieldSetter;
 
 public class EnhanceClazz4Interceptor {
 	private static Logger logger = LogManager
@@ -76,15 +74,14 @@ public class EnhanceClazz4Interceptor {
 						ClassLoadingStrategy.Default.INJECTION).getLoaded();
 
 		/**
-		 * to classloader. <br/>
+		 * create a new class using origin classname.<br/>
 		 * 
 		 * new class need:<br/>
 		 * 1.add field '_$EnhancedClassInstanceContext' of type
 		 * EnhancedClassInstanceContext <br/>
 		 * 
-		 * 2.intercept constructor and method if required by
-		 * interceptorDefineClass. use '@FieldValue' get
-		 * '_$EnhancedClassInstanceContext' ref<br/>
+		 * 2.intercept constructor by default, and intercept method which it's required by
+		 * interceptorDefineClass. <br/>
 		 */
 		IAroundInterceptor interceptor = define.instance();
 
diff --git a/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/EnhancedClassInstanceContext.java b/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/EnhancedClassInstanceContext.java
index f15ceff30..8a382a529 100644
--- a/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/EnhancedClassInstanceContext.java
+++ b/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/EnhancedClassInstanceContext.java
@@ -1,7 +1,7 @@
 package com.ai.cloud.skywalking.plugin.interceptor;
 
-import java.util.HashMap;
 import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
 
 /**
  * 被增强的类实例，需扩展的context属性，用于在不同的方法，或者构造函数间保存实例
@@ -12,7 +12,22 @@ import java.util.Map;
 public class EnhancedClassInstanceContext {
 	public static final String FIELD_NAME = "_$EnhancedClassInstanceContext";
 	
-	private Map<Object, Object> context = new HashMap<Object, Object>();
+	private Map<Object, Object> context = new ConcurrentHashMap<Object, Object>();
 	
+	public void set(Object key, Object value){
+		context.put(key, value);
+	}
 	
+	public Object get(Object key){
+		return context.get(key);
+	}
+	
+	public boolean isContain(Object key){
+		return context.containsKey(key);
+	}
+	
+	@SuppressWarnings("unchecked")
+	public <T> T get(Object key, Class<T> type){
+		return (T)this.get(key);
+	}
 }
diff --git a/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/FieldGetter.java b/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/FieldGetter.java
new file mode 100644
index 000000000..377556ce8
--- /dev/null
+++ b/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/FieldGetter.java
@@ -0,0 +1,5 @@
+package com.ai.cloud.skywalking.plugin.interceptor;
+
+public interface FieldGetter {
+	Object getValue();
+}
diff --git a/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/FieldSetter.java b/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/FieldSetter.java
new file mode 100644
index 000000000..22038757f
--- /dev/null
+++ b/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/FieldSetter.java
@@ -0,0 +1,5 @@
+package com.ai.cloud.skywalking.plugin.interceptor;
+
+public interface FieldSetter {
+	void setValue(Object value);
+}
diff --git a/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/InterceptorContext.java b/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/InterceptorContext.java
index 15a82da71..ce57108bb 100644
--- a/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/InterceptorContext.java
+++ b/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/InterceptorContext.java
@@ -16,6 +16,10 @@ public class InterceptorContext {
 		return this.allArguments;
 	}
 	
+	public String methodName(){
+		return methodName;
+	}
+	
 	public Object inst(){
 		return objInst;
 	}
diff --git a/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/InterceptorDefine.java b/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/InterceptorDefine.java
index c51010506..948c75906 100644
--- a/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/InterceptorDefine.java
+++ b/skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/InterceptorDefine.java
@@ -1,9 +1,25 @@
 package com.ai.cloud.skywalking.plugin.interceptor;
 
 public interface InterceptorDefine {
+	/**
+	 * 返回要被增强的类，应当返回类全名
+	 * 
+	 * @return
+	 */
 	public String getBeInterceptedClassName();
 	
+	/**
+	 * 返回需要被增强的方法列表
+	 * 
+	 * @return
+	 */
 	public String[] getBeInterceptedMethods();
 	
+	/**
+	 * 返回增强拦截器的实现<br/>
+	 * 每个拦截器在同一个被增强类的内部，保持单例
+	 * 
+	 * @return
+	 */
 	public IAroundInterceptor instance();
 }
diff --git a/skywalking-api/src/test/java/test/ai/cloud/plugin/TestAroundInterceptor.java b/skywalking-api/src/test/java/test/ai/cloud/plugin/TestAroundInterceptor.java
index 0f9455f70..f822e0ff8 100644
--- a/skywalking-api/src/test/java/test/ai/cloud/plugin/TestAroundInterceptor.java
+++ b/skywalking-api/src/test/java/test/ai/cloud/plugin/TestAroundInterceptor.java
@@ -9,17 +9,18 @@ public class TestAroundInterceptor implements IAroundInterceptor {
 
 	@Override
 	public void onConstruct(EnhancedClassInstanceContext context, ConstructorContext interceptorContext) {
+		context.set("test.key", "123");
 		System.out.println("onConstruct, args size=" + interceptorContext.allArguments().length);
 	}
 
 	@Override
 	public void beforeMethod(EnhancedClassInstanceContext context, InterceptorContext interceptorContext) {
-		System.out.println("beforeMethod : " + context);
+		System.out.println("beforeMethod : " + context.get("test.key", String.class));
 	}
 
 	@Override
 	public void afterMethod(EnhancedClassInstanceContext context, InterceptorContext interceptorContext) {
-		System.out.println("afterMethod: " + context);
+		System.out.println("afterMethod: " + context.get("test.key", String.class));
 	}
 
 }