diff --git a/README.cn.md b/README.cn.md
index b263415..588c36e 100644
--- a/README.cn.md
+++ b/README.cn.md
@@ -115,10 +115,24 @@ Stable Diffusion Webui 扩展Civitai助手，用于更轻松的管理和使用Ci
 ## 设置
 现在所有设置被移动到 Setting 页面->Civitai Helper区域中。
 
+### 代理
 代理输入框也在其中。
 有些sock5代理, 需要使用socks5h开头的形式"socks5h://xxxxx"才能生效。   
 ![](img/other_setting.jpg) 
 
+### Civitai API Key
+有些模型现在要登录civitai网站才能下载。要通过Civitai API做到这一点，你需要在你的civitai帐号设置中，创建一个API Key，然后填写到本扩展的设置中来。
+
+zixaphir写了一个详细的教程: [wiki](https://github.com/zixaphir/Stable-Diffusion-Webui-Civitai-Helper/wiki/Civitai-API-Key).
+
+这里是比较简单的教程:
+* 登录 civitai.com
+* 前往 [你的帐号的Account Setting页面](https://civitai.com/user/account)
+* 在页面底部，找到"API Keys"部分.
+* 点击"Add API Key"按钮, 起个名字.
+* 复制生成的api key字符串，粘贴到本扩展设置页面  -> Civitai API Key 部分.
+* 保存设置，并重启SD webui
+
 ## 预览图
 Extra Network支持两种预览图命名：`model_name.png` 和 `model_name.preview.png`。其中，`model_name.png`优先级较高。
 
diff --git a/README.md b/README.md
index 301570b..d784768 100644
--- a/README.md
+++ b/README.md
@@ -125,10 +125,24 @@ After clicking button, extension will download that civitai model's info and pre
 ## Settings
 Now all settings are moved into Setting tab->civitai helper section. 
 
+### Proxy
 For some sock5 proxy, need to be used as "socks5h://127.0.0.1:port".  
 
 ![](img/other_setting.jpg)
 
+### Civitai API Key
+You need to login civitai to download some models. To do this with Civitai API, you need to create an API Key in your account settings on Civitai's website.
+
+zixaphir created a detailed tutorial for this: [wiki](https://github.com/zixaphir/Stable-Diffusion-Webui-Civitai-Helper/wiki/Civitai-API-Key).
+
+Here is a simple tutorial:
+* Login civitai.com
+* go to [your account's setting page](https://civitai.com/user/account)
+* At the bottom of that page, find the "API Keys" section.
+* Click "Add API Key" button, give a name.
+* Copy the api key string, paste to this extension's setting page -> Civitai API Key section.
+* Save setting and Reload SD webui
+
 
 ## Preview Image
 Extra network uses both `model_file.png` and `model_file.preview.png` as preview image. But `model_file.png` has higher priority, because it is created by yourself.  
@@ -212,6 +226,9 @@ Since v1.5.5, we've already optimized the SHA256 function to the top. So the onl
 
 
 # Change Log
+## v1.9.0
+* support civitai API key for downloading. Check document for detail
+
 ## v1.8.3
 * fix a bug of removing model when model name has space in it.
 
diff --git a/scripts/ch_lib/downloader.py b/scripts/ch_lib/downloader.py
index 9e70942..36d00f9 100644
--- a/scripts/ch_lib/downloader.py
+++ b/scripts/ch_lib/downloader.py
@@ -88,6 +88,8 @@ def dl(url, folder, filename, filepath):
     # create header range
     headers = {'Range': 'bytes=%d-' % downloaded_size}
     headers['User-Agent'] = util.def_headers['User-Agent']
+    if util.civitai_api_key:
+        headers["Authorization"] = f"Bearer {util.civitai_api_key}"
 
     # download with header
     r = requests.get(url, stream=True, verify=False, headers=headers, proxies=util.proxies)
diff --git a/scripts/ch_lib/util.py b/scripts/ch_lib/util.py
index d85dcc4..f2f3011 100644
--- a/scripts/ch_lib/util.py
+++ b/scripts/ch_lib/util.py
@@ -6,13 +6,16 @@ import requests
 import shutil
 
 
-version = "1.8.3"
+version = "1.9.0"
 
-def_headers = {'User-Agent': 'Mozilla/5.0 (iPad; CPU OS 12_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148'}
+def_headers = {'User-Agent': 'Mozilla/5.0 (iPad; CPU OS 12_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148',
+               "Authorization": ""}
 
 
 proxies = None
 
+civitai_api_key = ""
+
 
 # print for debugging
 def printD(msg):
diff --git a/scripts/civitai_helper.py b/scripts/civitai_helper.py
index 2b0b6cb..e20abd5 100644
--- a/scripts/civitai_helper.py
+++ b/scripts/civitai_helper.py
@@ -44,6 +44,7 @@ def on_ui_settings():
     shared.opts.add_option("ch_skip_nsfw_preview", shared.OptionInfo(False, "Skip NSFW Preview Images", gr.Checkbox, {"interactive": True}, section=ch_section))
     shared.opts.add_option("ch_open_url_with_js", shared.OptionInfo(True, "Open Url At Client Side", gr.Checkbox, {"interactive": True}, section=ch_section))
     shared.opts.add_option("ch_proxy", shared.OptionInfo("", "Civitai Helper Proxy", gr.Textbox, {"interactive": True, "lines":1, "info":"format: socks5h://127.0.0.1:port"}, section=ch_section))
+    shared.opts.add_option("ch_civiai_api_key", shared.OptionInfo("", "Civitai API Key", gr.Textbox, {"interactive": True, "lines":1, "info":"check doc:https://github.com/zixaphir/Stable-Diffusion-Webui-Civitai-Helper/tree/master#api-key"}, section=ch_section))
 
 def on_ui_tabs():
     # init
@@ -68,6 +69,7 @@ def on_ui_tabs():
     skip_nsfw_preview = shared.opts.data.get("ch_skip_nsfw_preview", False)
     open_url_with_js = shared.opts.data.get("ch_open_url_with_js", True)
     proxy = shared.opts.data.get("ch_proxy", "")
+    civitai_api_key = shared.opts.data.get("ch_civiai_api_key", "")
 
     util.printD("Settings:")
     util.printD("max_size_preview: " + str(max_size_preview))
@@ -75,6 +77,15 @@ def on_ui_tabs():
     util.printD("open_url_with_js: " + str(open_url_with_js))
     util.printD("proxy: " + str(proxy))
 
+    # set civitai_api_key
+    has_api_key = False
+    if civitai_api_key:
+        has_api_key = True
+        util.civitai_api_key = civitai_api_key
+        util.def_headers["Authorization"] = f"Bearer {civitai_api_key}"
+
+    util.printD(f"use civitai api key: {has_api_key}")
+
     # set proxy
     if proxy:
         util.proxies = {
@@ -82,6 +93,7 @@ def on_ui_tabs():
             "https": proxy,
         }
 
+
     # ====Event's function====
     def scan_model(scan_model_types):
         return model_action_civitai.scan_model(scan_model_types, max_size_preview, skip_nsfw_preview)