diff --git a/cmd/update.go b/cmd/update.go
index 562b139e..6e3efbd3 100644
--- a/cmd/update.go
+++ b/cmd/update.go
@@ -1,11 +1,12 @@
 package cmd
 
 import (
-	"io/ioutil"
 	"log"
-	"os"
 	"path/filepath"
 
+	"github.com/zu1k/nali/pkg/cdn"
+	"github.com/zu1k/nali/pkg/zxipv6wry"
+
 	"github.com/zu1k/nali/constant"
 	"github.com/zu1k/nali/pkg/qqwry"
 
@@ -18,27 +19,31 @@ var updateCmd = &cobra.Command{
 	Short: "update chunzhen ip database",
 	Long:  `update chunzhen ip database`,
 	Run: func(cmd *cobra.Command, args []string) {
+		// Chunzhen ipv4
 		filePath := filepath.Join(constant.HomePath, "qqwry.dat")
-
-		log.Println("正在下载最新纯真 IP 库...")
-		tmpData, err := qqwry.Download(filePath)
+		log.Println("正在下载最新 纯真 IPv4数据库...")
+		_, err := qqwry.Download(filePath)
 		if err != nil {
 			log.Fatalln("下载失败", err.Error())
 			return
 		}
 
-		// 文件存在就删除
-		_, err = os.Stat(filePath)
-		if err == nil {
-			err = os.Remove(filePath)
-			if err != nil {
-				log.Fatalln("旧文件删除失败", err.Error())
-				os.Exit(1)
-			}
+		// ZX ipv6
+		filePath = filepath.Join(constant.HomePath, "ipv6wry.db")
+		log.Println("正在下载最新 ZX IPv6数据库...")
+		_, err = zxipv6wry.Download(filePath)
+		if err != nil {
+			log.Fatalln("下载失败", err.Error())
+			return
 		}
 
-		if err := ioutil.WriteFile(filePath, tmpData, 0644); err == nil {
-			log.Printf("已将最新的纯真 IP 库保存到本地 %s ", filePath)
+		// cdn
+		filePath = filepath.Join(constant.HomePath, "cdn.json")
+		log.Println("正在下载最新 CDN服务提供商数据库...")
+		_, err = cdn.Download(filePath)
+		if err != nil {
+			log.Fatalln("下载失败", err.Error())
+			return
 		}
 	},
 }
diff --git a/internal/app/cdn.go b/internal/app/cdn.go
index 604f163c..7d0b245e 100644
--- a/internal/app/cdn.go
+++ b/internal/app/cdn.go
@@ -2,9 +2,7 @@ package app
 
 import (
 	"fmt"
-	"io/ioutil"
 	"log"
-	"os"
 	"path/filepath"
 	"regexp"
 	"strings"
@@ -79,23 +77,9 @@ func UpdateDB() {
 	filePath := filepath.Join(constant.HomePath, "cdn.json")
 
 	log.Println("正在下载最新 CDN数据库...")
-	tmpData, err := cdn.Download()
+	_, err := cdn.Download(filePath)
 	if err != nil {
 		log.Fatalln("下载失败", err.Error())
 		return
 	}
-
-	// 文件存在就删除
-	_, err = os.Stat(filePath)
-	if err == nil {
-		err = os.Remove(filePath)
-		if err != nil {
-			log.Fatalln("旧文件删除失败", err.Error())
-			os.Exit(1)
-		}
-	}
-
-	if err := ioutil.WriteFile(filePath, tmpData, 0644); err == nil {
-		log.Printf("已将最新的CDN数据库保存到本地 %s ", filePath)
-	}
 }
diff --git a/pkg/cdn/cdn.go b/pkg/cdn/cdn.go
index 5264baa7..554a04cd 100644
--- a/pkg/cdn/cdn.go
+++ b/pkg/cdn/cdn.go
@@ -22,22 +22,14 @@ func NewCDN(filePath string) CDN {
 	cdnDist := make(CDNDist)
 	cdnData := make([]byte, 0)
 
-	// 判断文件是否存在
 	_, err := os.Stat(filePath)
 	if err != nil && os.IsNotExist(err) {
 		log.Println("文件不存在，尝试从网络获取最新CDN数据库")
-		cdnData, err = Download()
+		cdnData, err = Download(filePath)
 		if err != nil {
-			log.Printf("CDN数据库下载失败，请手动下载解压后保存到本地: %s \n", filePath)
-			log.Println("下载链接： https://cdn.jsdelivr.net/gh/SukkaLab/cdn/dist/cdn.json")
 			os.Exit(1)
-		} else {
-			if err := ioutil.WriteFile(filePath, cdnData, 0644); err == nil {
-				log.Printf("已将最新的 CDN数据库 保存到本地: %s \n", filePath)
-			}
 		}
 	} else {
-		// 打开文件句柄
 		cdnFile, err := os.OpenFile(filePath, os.O_RDONLY, 0400)
 		if err != nil {
 			panic(err)
diff --git a/pkg/cdn/update.go b/pkg/cdn/update.go
index 619f9f9a..3e5a5f20 100644
--- a/pkg/cdn/update.go
+++ b/pkg/cdn/update.go
@@ -2,10 +2,28 @@ package cdn
 
 import (
 	"io/ioutil"
+	"log"
 	"net/http"
+
+	"github.com/zu1k/nali/pkg/common"
 )
 
-func Download() (data []byte, err error) {
+func Download(filePath string) (data []byte, err error) {
+	data, err = getData()
+	if err != nil {
+		log.Printf("CDN数据库下载失败，请手动下载解压后保存到本地: %s \n", filePath)
+		log.Println("下载链接： https://cdn.jsdelivr.net/gh/SukkaLab/cdn/dist/cdn.json")
+		return
+	}
+
+	common.ExistThenRemove(filePath)
+	if err := ioutil.WriteFile(filePath, data, 0644); err == nil {
+		log.Printf("已将最新的 CDN数据库 保存到本地: %s \n", filePath)
+	}
+	return
+}
+
+func getData() (data []byte, err error) {
 	//resp, err := http.Get("https://raw.githubusercontent.com/SukkaLab/cdn/master/dist/cdn.json")
 	resp, err := http.Get("https://cdn.jsdelivr.net/gh/SukkaLab/cdn/dist/cdn.json")
 	if err != nil {
diff --git a/pkg/common/dbtool.go b/pkg/common/dbtool.go
index 79d6b8e0..011e186f 100644
--- a/pkg/common/dbtool.go
+++ b/pkg/common/dbtool.go
@@ -1,8 +1,24 @@
 package common
 
+import (
+	"log"
+	"os"
+)
+
 func ByteToUInt32(data []byte) uint32 {
 	i := uint32(data[0]) & 0xff
 	i |= (uint32(data[1]) << 8) & 0xff00
 	i |= (uint32(data[2]) << 16) & 0xff0000
 	return i
 }
+
+func ExistThenRemove(filePath string) {
+	_, err := os.Stat(filePath)
+	if err == nil {
+		err = os.Remove(filePath)
+		if err != nil {
+			log.Fatalln("旧文件删除失败", err.Error())
+			os.Exit(1)
+		}
+	}
+}
diff --git a/pkg/qqwry/update.go b/pkg/qqwry/update.go
index 3b836ec0..9905f84b 100644
--- a/pkg/qqwry/update.go
+++ b/pkg/qqwry/update.go
@@ -7,6 +7,8 @@ import (
 	"io/ioutil"
 	"log"
 	"net/http"
+
+	"github.com/zu1k/nali/pkg/common"
 )
 
 func Download(filePath string) (data []byte, err error) {
@@ -16,7 +18,7 @@ func Download(filePath string) (data []byte, err error) {
 		log.Println("下载链接： https://qqwry.mirror.noc.one/qqwry.rar")
 		return
 	}
-
+	common.ExistThenRemove(filePath)
 	if err = ioutil.WriteFile(filePath, data, 0644); err == nil {
 		log.Printf("已将最新的 纯真IP库 保存到本地: %s ", filePath)
 	}
diff --git a/pkg/zxipv6wry/update.go b/pkg/zxipv6wry/update.go
index 5708b4af..a7aca376 100644
--- a/pkg/zxipv6wry/update.go
+++ b/pkg/zxipv6wry/update.go
@@ -7,6 +7,8 @@ import (
 	"net/http"
 	"os"
 
+	"github.com/zu1k/nali/pkg/common"
+
 	"github.com/saracen/go7z"
 )
 
@@ -17,7 +19,7 @@ func Download(filePath string) (data []byte, err error) {
 		log.Println("下载链接： https://www.zxinc.org/ip.7z")
 		return
 	}
-
+	common.ExistThenRemove(filePath)
 	if err = ioutil.WriteFile(filePath, data, 0644); err == nil {
 		log.Printf("已将最新的 ZX IPv6数据库 保存到本地: %s ", filePath)
 	}