diff --git a/OrzMC/app/Client.py b/OrzMC/app/Client.py
index 5fe0a17..39992f1 100644
--- a/OrzMC/app/Client.py
+++ b/OrzMC/app/Client.py
@@ -4,6 +4,8 @@
 from ..utils.utils import *
 from ..utils.ColorString import ColorString
 from ..core.OptiFine import OptiFine
+from ..core.Fabric import Fabric
+
 import os
 import uuid
 import datetime
@@ -147,12 +149,19 @@ def gameArguments(self, user, resolution):
         mainCls =  self.config.game_version_json_obj().get('mainClass')
         classPathList = self.javaClassPathList()
 
-        if self.config.isPure and self.config.optifine:
-            optifine_config = OptiFine.json_configuration(self.config)
-            if optifine_config != None:
-                mainCls = optifine_config.get('mainClass')
-                optifine_jar_paths = OptiFine.library_optifine_jar_paths(self.config)
-                classPathList = optifine_jar_paths + classPathList
+        if self.config.isPure:
+            if self.config.optifine:
+                optifine_config = OptiFine.json_configuration(self.config)
+                if optifine_config != None:
+                    mainCls = optifine_config.get('mainClass')
+                    optifine_jar_paths = OptiFine.library_optifine_jar_paths(self.config)
+                    classPathList = optifine_jar_paths + classPathList
+            elif self.config.fabric:
+                fabric_config = Fabric.json_configuration(self.config)
+                if fabric_config != None:
+                    mainCls = fabric_config.get('mainClass')
+                    fabric_jar_paths = Fabric.library_fabric_jar_paths(self.config)
+                    classPathList = fabric_jar_paths + classPathList
 
         sep = self.config.java_class_path_list_separator()
         classPath = sep.join(classPathList)
@@ -199,6 +208,10 @@ def gameArguments(self, user, resolution):
             '-Xmx%s' % mem_max,
             '-Djava.net.preferIPv4Stack=true'
         ]
+
+        if self.config.isPure and self.config.fabric:
+            jvm_opts.extend(Fabric.jvmOpts(self.config))
+
         arguments.extend(jvm_opts)
 
         game_arguments = self.config.game_version_json_obj().get('arguments')
@@ -277,10 +290,16 @@ def gameArguments(self, user, resolution):
         if self.config.isForge:
             arguments.extend(self.config.game_version_json_obj().get('arguments').get('game'))
         
-        if self.config.isPure and self.config.optifine:
-            optifine_config = OptiFine.json_configuration(self.config)
-            if optifine_config != None:
-                arguments.extend(optifine_config.get('arguments').get('game'))
+        if self.config.isPure: 
+            if self.config.optifine:
+                optifine_config = OptiFine.json_configuration(self.config)
+                if optifine_config != None:
+                    arguments.extend(optifine_config.get('arguments').get('game'))
+            elif self.config.fabric:
+                fabric_config = Fabric.json_configuration(self.config)
+                if fabric_config != None:
+                    arguments.extend(fabric_config.get('arguments').get('game'))
+                    
         arguments = ' '.join(arguments)
         return arguments
 
diff --git a/OrzMC/app/Config.py b/OrzMC/app/Config.py
index c04265d..ab1fa60 100644
--- a/OrzMC/app/Config.py
+++ b/OrzMC/app/Config.py
@@ -56,6 +56,7 @@ def __init__(self,args):
         self.force_upgrade = args.force_upgrade_world
         self.backup = args.backup_world
         self.optifine = args.optifine
+        self.fabric = args.fabric
         self.api = args.api
         self.force_download = args.force_download
 
diff --git a/OrzMC/app/Console.py b/OrzMC/app/Console.py
index aea788d..9de584a 100644
--- a/OrzMC/app/Console.py
+++ b/OrzMC/app/Console.py
@@ -77,9 +77,12 @@ def showUserName(self):
 
     def selectLauncherProfile(self):
 
-        if not self.config.is_client or not self.config.isPure or not self.config.optifine:
+        if not self.config.is_client or not self.config.isPure:
             return 
 
+        if not (self.config.optifine or self.config.fabric):
+            return
+
         launcher_profiles_json_file_path = self.config.game_version_launcher_profiles_json_path()
         if os.path.exists(launcher_profiles_json_file_path):
             content = None
diff --git a/OrzMC/app/Downloader.py b/OrzMC/app/Downloader.py
index c7b46cb..207c745 100644
--- a/OrzMC/app/Downloader.py
+++ b/OrzMC/app/Downloader.py
@@ -7,6 +7,7 @@
 from ..core.Spigot import Spigot
 from ..core.Forge import Forge
 from ..core.OptiFine import OptiFine
+from ..core.Fabric import Fabric
 from ..core.BMCLAPI import BMCLAPI
 
 from tqdm import tqdm
@@ -166,6 +167,8 @@ def donwloadLibraries(self):
                 filePath=os.path.join(fileDir,os.path.basename(url))
                 if not checkFileExist(filePath,sha1):
                     self.download(url,fileDir, prefix_desc=prefix_desc)
+        
+        self.downloadFabricLibraries()
 
     def downloadPaperServerJarFile(self):
         '''下载Paper服务端JAR文件'''
@@ -268,4 +271,15 @@ def redirectUrl(self,url):
                 print(redirected_url)
             return redirected_url
 
-        return url
\ No newline at end of file
+        return url
+
+    def downloadFabricLibraries(self):
+        if self.config.isPure and self.config.fabric:
+            for (url, file_path) in Fabric.downloadLibrariesMap(self.config).items():
+                dir_path = os.path.dirname(file_path)
+                if not os.path.exists(dir_path):
+                    self.download(
+                        url,
+                        dir_path,
+                        prefix_desc = 'Fabric:'
+                    )
\ No newline at end of file
diff --git a/OrzMC/app/Game.py b/OrzMC/app/Game.py
index 214f00a..037f7b0 100644
--- a/OrzMC/app/Game.py
+++ b/OrzMC/app/Game.py
@@ -25,10 +25,13 @@ def start(self):
         # 控制台用户交互展示
         self.console.userInteraction()
 
-        try:
-            #启动游戏
-            self.game.start()
-            
-        except Exception as e:
-            print(e)
-            print(ColorString.warn('Start Failed!!!'))
\ No newline at end of file
+        if self.config.debug:
+            self.game.start() 
+        else:
+            try:
+                #启动游戏
+                self.game.start()
+                
+            except Exception as e:
+                print(e)
+                print(ColorString.warn('Start Failed!!!'))
\ No newline at end of file
diff --git a/OrzMC/app/OrzMC.py b/OrzMC/app/OrzMC.py
index 335e9a8..ba1065c 100644
--- a/OrzMC/app/OrzMC.py
+++ b/OrzMC/app/OrzMC.py
@@ -64,6 +64,8 @@ def parse_args():
     parser.add_argument('-d','--daemon', dest='deamon', default=False, action='store_true', help='config daemon for minecraft server with systemctl manage')
     # setup minecraft server skin system
     parser.add_argument('-S','--skin_system', dest='skin_system', default=False, action='store_true', help='setup skin system for minecraft paper server')
+    # setup fabric
+    parser.add_argument('-M','--fabric', default=False, action='store_true', help='if you have installed fabric for client, you can add this option to launch client with fabric be activated')
 
     args = parser.parse_args()
     return args
diff --git a/OrzMC/core/Fabric.py b/OrzMC/core/Fabric.py
new file mode 100644
index 0000000..6f681d4
--- /dev/null
+++ b/OrzMC/core/Fabric.py
@@ -0,0 +1,50 @@
+# -*- coding: utf8 -*-
+import os
+import json
+import re
+from ..utils.utils import makedirs
+
+# https://fabricmc.net/use/
+
+class Fabric:
+
+    _configuration = None
+
+    @classmethod
+    def json_configuration(cls, config):
+        if Fabric._configuration == None:
+            fabric_json_path = os.path.join(config.game_version_client_versions_dir(), config.lastVersionId, config.lastVersionId + '.json')
+            if  'fabric' in config.lastVersionId.lower() and os.path.exists(fabric_json_path):
+                with open(fabric_json_path, 'r') as f:
+                    Fabric._configuration = json.load(f)
+        return Fabric._configuration
+
+    @classmethod
+    def library_fabric_jar_paths(cls, config):
+        ret = []
+        for (url, file_path) in Fabric.downloadLibrariesMap(config).items():
+            ret.append(file_path)
+        return ret
+
+    @classmethod
+    def jvmOpts(cls, config):
+        ret = []
+        for o in Fabric.json_configuration(config).get('arguments').get('jvm'):
+            o = re.sub(r'\s','',o)
+            ret.append(o)
+        return ret
+
+    @classmethod
+    def downloadLibrariesMap(cls, config):
+        ret = {}
+        for l in Fabric.json_configuration(config).get('libraries'):
+            name = l.get('name')
+            splits = name.split(':')
+            splits = splits[0].split('.') + splits[1:]
+            file_name = '-'.join(splits[-2:]) + '.jar'
+            dir_path = os.path.join(config.game_version_client_library_dir(),*splits)
+            makedirs(dir_path)
+            url_path ='/'.join(splits + [file_name])
+            url = l.get('url') + url_path
+            ret[url] = os.path.join(dir_path, file_name)
+        return ret
diff --git a/OrzMC/core/OptiFine.py b/OrzMC/core/OptiFine.py
index 9a8721a..58c0dd4 100644
--- a/OrzMC/core/OptiFine.py
+++ b/OrzMC/core/OptiFine.py
@@ -2,6 +2,8 @@
 import os
 import json
 
+# https://www.optifine.net/downloads
+
 class OptiFine:
 
     _configuration = None
diff --git a/OrzMC/core/__init__.py b/OrzMC/core/__init__.py
index 64f7a25..9991a23 100644
--- a/OrzMC/core/__init__.py
+++ b/OrzMC/core/__init__.py
@@ -8,4 +8,5 @@
     'PaperAPI',
     'Spigot',
     'BMCLAPI',
+    'Fabric',
 ]
\ No newline at end of file
diff --git a/OrzMCL/OrzMCL.py b/OrzMCL/OrzMCL.py
index 9259680..4de9413 100755
--- a/OrzMCL/OrzMCL.py
+++ b/OrzMCL/OrzMCL.py
@@ -94,7 +94,8 @@ def startGame(self, instance):
                 debug = False,
                 force_upgrade = False,
                 backup = False,
-                optifine = False
+                optifine = False,
+                fabric = False,
             )
             Game(config).startClient()
             self.infoLabel.text = ''