diff --git a/mybatis-flex-core/src/main/java/com/mybatisflex/core/update/ModifyAttrsRecordHandler.java b/mybatis-flex-core/src/main/java/com/mybatisflex/core/update/ModifyAttrsRecordHandler.java
index d76b083d..6f5e4c2c 100644
--- a/mybatis-flex-core/src/main/java/com/mybatisflex/core/update/ModifyAttrsRecordHandler.java
+++ b/mybatis-flex-core/src/main/java/com/mybatisflex/core/update/ModifyAttrsRecordHandler.java
@@ -25,7 +25,9 @@ import java.util.Map;
 
 class ModifyAttrsRecordHandler implements MethodHandler {
 
-    //更新内容
+    /**
+     * 更新的字段和内容
+     */
     private final Map<String, Object> updates = new LinkedHashMap<>();
 
     public Map<String, Object> getUpdates() {
diff --git a/mybatis-flex-core/src/main/java/com/mybatisflex/core/update/ModifyAttrsRecordProxyFactory.java b/mybatis-flex-core/src/main/java/com/mybatisflex/core/update/ModifyAttrsRecordProxyFactory.java
index e96fe126..aac36f31 100644
--- a/mybatis-flex-core/src/main/java/com/mybatisflex/core/update/ModifyAttrsRecordProxyFactory.java
+++ b/mybatis-flex-core/src/main/java/com/mybatisflex/core/update/ModifyAttrsRecordProxyFactory.java
@@ -19,8 +19,11 @@ import com.mybatisflex.core.util.ClassUtil;
 import org.apache.ibatis.javassist.util.proxy.ProxyFactory;
 import org.apache.ibatis.javassist.util.proxy.ProxyObject;
 import org.apache.ibatis.logging.LogFactory;
+import org.apache.ibatis.util.MapUtil;
 
 import java.util.Arrays;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
 
 
 /**
@@ -28,37 +31,38 @@ import java.util.Arrays;
  */
 public class ModifyAttrsRecordProxyFactory {
 
-    private static final ModifyAttrsRecordProxyFactory instance = new ModifyAttrsRecordProxyFactory();
+    protected static final Map<Class<?>, Class<?>> CACHE = new ConcurrentHashMap<>();
+    private static final ModifyAttrsRecordProxyFactory INSTANCE = new ModifyAttrsRecordProxyFactory();
 
     public static ModifyAttrsRecordProxyFactory getInstance() {
-        return instance;
+        return INSTANCE;
     }
 
     private ModifyAttrsRecordProxyFactory() {
     }
 
     public <T> T get(Class<T> target) {
-        ProxyFactory factory = new ProxyFactory();
-        factory.setSuperclass(target);
+        Class<?> proxyClass = MapUtil.computeIfAbsent(CACHE, target, aClass -> {
+            ProxyFactory factory = new ProxyFactory();
+            factory.setSuperclass(target);
 
-        Class<?>[] interfaces = Arrays.copyOf(target.getInterfaces(), target.getInterfaces().length + 1);
-        interfaces[interfaces.length - 1] = UpdateWrapper.class;
-        factory.setInterfaces(interfaces);
+            Class<?>[] interfaces = Arrays.copyOf(target.getInterfaces(), target.getInterfaces().length + 1);
+            interfaces[interfaces.length - 1] = UpdateWrapper.class;
+            factory.setInterfaces(interfaces);
 
-        final Class<?> proxyClass = factory.createClass();
+            return factory.createClass();
+        });
 
         T proxyObject = null;
         try {
             proxyObject = (T) ClassUtil.newInstance(proxyClass);
             ((ProxyObject) proxyObject).setHandler(new ModifyAttrsRecordHandler());
-        } catch (Exception e){
+        } catch (Exception e) {
             LogFactory.getLog(ModifyAttrsRecordProxyFactory.class).error(e.toString(), e);
         }
 
         return proxyObject;
     }
-
-
 }
 
 
diff --git a/mybatis-flex-core/src/main/java/com/mybatisflex/core/util/ClassUtil.java b/mybatis-flex-core/src/main/java/com/mybatisflex/core/util/ClassUtil.java
index 541018a8..2ba8ac04 100644
--- a/mybatis-flex-core/src/main/java/com/mybatisflex/core/util/ClassUtil.java
+++ b/mybatis-flex-core/src/main/java/com/mybatisflex/core/util/ClassUtil.java
@@ -141,7 +141,7 @@ public class ClassUtil {
             // 没有任何构造函数的情况下，去查找 static 工厂方法，满足 lombok 注解的需求
             else {
                 Method factoryMethod = ClassUtil.getFirstMethod(clazz, m -> m.getParameterCount() == 0
-                    && clazz.isAssignableFrom(m.getReturnType())
+                    && clazz == m.getReturnType()
                     && Modifier.isPublic(m.getModifiers())
                     && Modifier.isStatic(m.getModifiers()));
                 if (factoryMethod != null) {
diff --git a/mybatis-flex-test/mybatis-flex-native-test/src/main/java/com/mybatisflex/test/MainSqlTest.java b/mybatis-flex-test/mybatis-flex-native-test/src/main/java/com/mybatisflex/test/MainSqlTest.java
index 528d4fb6..7760bb1f 100644
--- a/mybatis-flex-test/mybatis-flex-native-test/src/main/java/com/mybatisflex/test/MainSqlTest.java
+++ b/mybatis-flex-test/mybatis-flex-native-test/src/main/java/com/mybatisflex/test/MainSqlTest.java
@@ -53,7 +53,7 @@ public class MainSqlTest {
 
         String sql2 = UpdateChain.of(Article.class)
             .set("xxxx", "xxxx")
-//            .where(Article::getId).ge(100)
+            .where(Article::getId).ge(100)
             .toSQL();
 
         System.out.println(sql2);