diff --git a/doc/admin-api.md b/doc/admin-api.md
index 22faa506..51e70c50 100644
--- a/doc/admin-api.md
+++ b/doc/admin-api.md
@@ -658,8 +658,10 @@ Return response from etcd currently.
 
 |Parameter      |Required   |Type |Description        |Example|
 |---------|---------|----|-----------|----|
-|cert|True|Public key|https Public key||
-|key|True|Private key|https Private key||
+|cert|True|Certificate|https certificate||
+|key|True|Private key|https private key||
+|certs|False|An array of certificate|when you need to configure multiple certificate for the same domain, you can pass extra https certificates (excluding the one given as cert) in this field||
+|keys|False|An array of private key|https private keys. The keys should be paired with certs above||
 |sni|True|Match Rules|https SNI||
 |labels|False |Match Rules|Key/value pairs to specify attributes|{"version":"v2","build":"16","env":"production"}|
 |create_time|False| Auxiliary|epoch timestamp in second, will be created automatically if missing | 1602883670|
@@ -670,7 +672,7 @@ Config Example:
 ```shell
 {
     "id": "1",      # id
-    "cert": "cert", # Public key
+    "cert": "cert", # Certificate
     "key": "key",   # Private key
     "sni": "sni"    # https SNI
 }
diff --git a/doc/zh-cn/admin-api.md b/doc/zh-cn/admin-api.md
index a126e1cd..5dae7d59 100644
--- a/doc/zh-cn/admin-api.md
+++ b/doc/zh-cn/admin-api.md
@@ -671,8 +671,10 @@ HTTP/1.1 200 OK
 
 |名字      |可选项   |类型 |说明        |示例|
 |---------|---------|----|-----------|----|
-|cert|必需|公钥|https 证书公钥||
+|cert|必需|证书|https 证书||
 |key|必需|私钥|https 证书私钥||
+|certs|可选|证书字符串数组|当你想给同一个域名配置多个证书时，除了第一个证书需要通过cert传递外，剩下的证书可以通过该参数传递上来||
+|keys|可选|私钥字符串数组|certs 对应的证书私钥，注意要跟 certs 一一对应||
 |sni|必需|匹配规则|https 证书SNI||
 |labels|可选|匹配规则|标识附加属性的键值对|{"version":"v2","build":"16","env":"production"}|
 |create_time|可选|辅助|单位为秒的 epoch 时间戳，如果不指定则自动创建|1602883670|
@@ -683,7 +685,7 @@ ssl 对象 json 配置内容：
 ```shell
 {
     "id": "1",          # id
-    "cert": "cert",     # 公钥
+    "cert": "cert",     # 证书
     "key": "key",       # 私钥
     "sni": "sni"        # host 域名
 }