diff --git a/MJExtension.podspec b/MJExtension.podspec
index 61ec3d4e..f312ea72 100644
--- a/MJExtension.podspec
+++ b/MJExtension.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = "MJExtension"
-  s.version      = "3.0.10"
+  s.version      = "3.0.11"
   s.ios.deployment_target = '6.0'
   s.osx.deployment_target = '10.8'
   s.summary      = "A fast and convenient conversion between JSON and model"
diff --git a/MJExtension/NSObject+MJKeyValue.h b/MJExtension/NSObject+MJKeyValue.h
index e2319405..2428a4ab 100755
--- a/MJExtension/NSObject+MJKeyValue.h
+++ b/MJExtension/NSObject+MJKeyValue.h
@@ -38,7 +38,7 @@
  *
  *  @return 从字典中取值用的key
  */
-+ (NSString *)mj_replacedKeyFromPropertyName121:(NSString *)propertyName;
++ (id)mj_replacedKeyFromPropertyName121:(NSString *)propertyName;
 
 /**
  *  数组中需要转换的模型类
diff --git a/MJExtension/NSObject+MJProperty.h b/MJExtension/NSObject+MJProperty.h
index 1a64732b..e4e0ebb1 100644
--- a/MJExtension/NSObject+MJProperty.h
+++ b/MJExtension/NSObject+MJProperty.h
@@ -21,7 +21,7 @@ typedef void (^MJPropertiesEnumeration)(MJProperty *property, BOOL *stop);
 
 /** 将属性名换为其他key去字典中取值 */
 typedef NSDictionary * (^MJReplacedKeyFromPropertyName)();
-typedef NSString * (^MJReplacedKeyFromPropertyName121)(NSString *propertyName);
+typedef id (^MJReplacedKeyFromPropertyName121)(NSString *propertyName);
 /** 数组中需要转换的模型类 */
 typedef NSDictionary * (^MJObjectClassInArray)();
 /** 用于过滤字典中的值 */
diff --git a/MJExtension/NSObject+MJProperty.m b/MJExtension/NSObject+MJProperty.m
index 9ac6134c..fd7197a0 100644
--- a/MJExtension/NSObject+MJProperty.m
+++ b/MJExtension/NSObject+MJProperty.m
@@ -53,11 +53,11 @@ + (NSMutableDictionary *)dictForKey:(const void *)key
 }
 
 #pragma mark - --私有方法--
-+ (NSString *)propertyKey:(NSString *)propertyName
++ (id)propertyKey:(NSString *)propertyName
 {
     MJExtensionAssertParamNotNil2(propertyName, nil);
     
-    __block NSString *key = nil;
+    __block id key = nil;
     // 查看有没有需要替换的key
     if ([self respondsToSelector:@selector(mj_replacedKeyFromPropertyName121:)]) {
         key = [self mj_replacedKeyFromPropertyName121:propertyName];
@@ -79,21 +79,21 @@ + (NSString *)propertyKey:(NSString *)propertyName
     }
     
     // 查看有没有需要替换的key
-    if (!key && [self respondsToSelector:@selector(mj_replacedKeyFromPropertyName)]) {
+    if ((!key || [key isEqual:propertyName]) && [self respondsToSelector:@selector(mj_replacedKeyFromPropertyName)]) {
         key = [self mj_replacedKeyFromPropertyName][propertyName];
     }
     // 兼容旧版本
-    if (!key && [self respondsToSelector:@selector(replacedKeyFromPropertyName)]) {
+    if ((!key || [key isEqual:propertyName]) && [self respondsToSelector:@selector(replacedKeyFromPropertyName)]) {
         key = [self performSelector:@selector(replacedKeyFromPropertyName)][propertyName];
     }
     
-    if (!key) {
+    if (!key || [key isEqual:propertyName]) {
         [self mj_enumerateAllClasses:^(__unsafe_unretained Class c, BOOL *stop) {
             NSDictionary *dict = objc_getAssociatedObject(c, &MJReplacedKeyFromPropertyNameKey);
             if (dict) {
                 key = dict[propertyName];
             }
-            if (key) *stop = YES;
+            if (key && ![key isEqual:propertyName]) *stop = YES;
         }];
     }