diff --git a/internal/web/actions/default/setup/validateApi.go b/internal/web/actions/default/setup/validateApi.go
index 2b8e8f63..f152b6e1 100644
--- a/internal/web/actions/default/setup/validateApi.go
+++ b/internal/web/actions/default/setup/validateApi.go
@@ -10,6 +10,7 @@ import (
 	"github.com/iwind/TeaGo/maps"
 	"github.com/iwind/TeaGo/types"
 	"net"
+	"regexp"
 	"strings"
 )
 
@@ -61,7 +62,24 @@ func (this *ValidateApiAction) RunPost(params struct {
 		}
 
 		if net.ParseIP(params.NewHost) == nil {
-			this.FailField("newHost", "请输入正确的API节点主机地址")
+			// 检查是否为域名
+			var domainReg = regexp.MustCompile(`^[\w-]+$`) // 这里暂不支持 unicode 域名
+			var digitReg = regexp.MustCompile(`^\d+$`)
+			var isIP = true
+			for _, piece := range strings.Split(params.NewHost, ".") {
+				if !domainReg.MatchString(piece) {
+					this.FailField("newHost", "请输入正确的API节点主机地址")
+					return
+				}
+				if !digitReg.MatchString(piece) {
+					isIP = false
+				}
+			}
+
+			if isIP {
+				this.FailField("newHost", "请输入正确的API节点主机地址")
+				return
+			}
 		}
 
 		params.Must.
diff --git a/web/views/@default/setup/index.html b/web/views/@default/setup/index.html
index 4a6c955e..d4159689 100644
--- a/web/views/@default/setup/index.html
+++ b/web/views/@default/setup/index.html
@@ -89,7 +89,7 @@
                                     <input type="text" name="newHost" value="" ref="newHostRef" placeholder="x.x.x.x" v-model="currentHost"/>
 								</div>
 							</div>
-							<p class="comment">其他节点访问此API节点的主机地址，可以是IP或者域名，第一次安装时通常是<strong>当前服务器</strong>的公网IP地址。后期可以修改这个地址。</p>
+							<p class="comment">API节点IP地址或者域名。其他节点访问此API节点的主机地址，可以是IP或者域名，第一次安装时通常是<strong>当前服务器</strong>的公网IP地址。后期可以修改这个地址。</p>
 						</td>
 					</tr>
 				</tbody>