diff --git a/internal/pcscommand/download.go b/internal/pcscommand/download.go
index 47710f87..c4500ce0 100644
--- a/internal/pcscommand/download.go
+++ b/internal/pcscommand/download.go
@@ -1,11 +1,13 @@
 package pcscommand
 
 import (
+	"encoding/hex"
 	"errors"
 	"fmt"
 	"github.com/iikira/BaiduPCS-Go/baidupcs"
 	"github.com/iikira/BaiduPCS-Go/internal/pcsconfig"
 	"github.com/iikira/BaiduPCS-Go/pcstable"
+	"github.com/iikira/BaiduPCS-Go/pcsutil/checksum"
 	"github.com/iikira/BaiduPCS-Go/pcsutil/converter"
 	"github.com/iikira/BaiduPCS-Go/pcsutil/waitgroup"
 	"github.com/iikira/BaiduPCS-Go/requester"
@@ -29,28 +31,38 @@ const (
 	StrDownloadInitError = "初始化下载发生错误"
 )
 
-// dtask 下载任务
-type dtask struct {
-	ListTask
-	path         string                  // 下载的路径
-	savePath     string                  // 保存的路径
-	downloadInfo *baidupcs.FileDirectory // 文件或目录详情
-}
+var (
+	// ErrNotSupportChecksum 文件不支持校验
+	ErrNotSupportChecksum = errors.New("该文件不支持校验")
+	// ErrChecksumFailed 文件校验失败
+	ErrChecksumFailed = errors.New("该文件校验失败, 文件md5值与服务器记录的不匹配")
+)
 
-//DownloadOptions 下载可选参数
-type DownloadOptions struct {
-	IsTest               bool
-	IsPrintStatus        bool
-	IsExecutedPermission bool
-	IsOverwrite          bool
-	IsShareDownload      bool
-	IsLocateDownload     bool
-	IsStreaming          bool
-	SaveTo               string
-	Parallel             int
-	Load                 int
-	Out                  io.Writer
-}
+type (
+	// dtask 下载任务
+	dtask struct {
+		ListTask
+		path         string                  // 下载的路径
+		savePath     string                  // 保存的路径
+		downloadInfo *baidupcs.FileDirectory // 文件或目录详情
+	}
+
+	//DownloadOptions 下载可选参数
+	DownloadOptions struct {
+		IsTest               bool
+		IsPrintStatus        bool
+		IsExecutedPermission bool
+		IsOverwrite          bool
+		IsShareDownload      bool
+		IsLocateDownload     bool
+		IsStreaming          bool
+		SaveTo               string
+		Parallel             int
+		Load                 int
+		NoCheck              bool
+		Out                  io.Writer
+	}
+)
 
 func downloadPrintFormat(load int) string {
 	if load <= 1 {
@@ -184,6 +196,27 @@ func download(id int, downloadURL, savePath string, loadBalansers []string, clie
 	return nil
 }
 
+// checkFileValid 检测文件有效性
+func checkFileValid(filePath string, fileInfo *baidupcs.FileDirectory) error {
+	if len(fileInfo.BlockList) != 1 {
+		return ErrNotSupportChecksum
+	}
+
+	f := checksum.NewLocalFileInfo(filePath, int(256*converter.KB))
+	err := f.OpenPath()
+	if err != nil {
+		return err
+	}
+
+	defer f.Close()
+
+	f.Md5Sum()
+	if strings.Compare(hex.EncodeToString(f.MD5), fileInfo.MD5) != 0 {
+		return ErrChecksumFailed
+	}
+	return nil
+}
+
 // RunDownload 执行下载网盘内文件
 func RunDownload(paths []string, options *DownloadOptions) {
 	if options == nil {
@@ -258,6 +291,8 @@ func RunDownload(paths []string, options *DownloadOptions) {
 
 			// 不重试的情况
 			switch {
+			case err == ErrNotSupportChecksum:
+				fallthrough
 			case strings.Compare(errManifest, "下载文件错误") == 0 && strings.Contains(err.Error(), StrDownloadInitError):
 				fmt.Fprintf(options.Out, "[%d] %s, %s\n", task.ID, errManifest, err)
 				return
@@ -420,6 +455,18 @@ func RunDownload(paths []string, options *DownloadOptions) {
 				return
 			}
 
+			if !cfg.IsTest && !options.NoCheck {
+				if task.downloadInfo.Size >= 128*converter.MB {
+					fmt.Fprintf(options.Out, "[%d] 开始检验文件有效性, 稍后...\n", task.ID)
+				}
+				err = checkFileValid(task.savePath, task.downloadInfo)
+				if err != nil {
+					handleTaskErr(task, "检验文件有效性出错", err)
+				} else {
+					fmt.Fprintf(options.Out, "[%d] 检验文件有效性成功\n", task.ID)
+				}
+			}
+
 			atomic.AddInt64(&totalSize, task.downloadInfo.Size)
 		}()
 	}
diff --git a/internal/pcscommand/share.go b/internal/pcscommand/share.go
index 0be8b0a9..973fecaa 100644
--- a/internal/pcscommand/share.go
+++ b/internal/pcscommand/share.go
@@ -5,7 +5,6 @@ import (
 	"github.com/iikira/BaiduPCS-Go/baidupcs"
 	"github.com/iikira/BaiduPCS-Go/internal/pcsconfig"
 	"github.com/iikira/BaiduPCS-Go/pcstable"
-	"github.com/iikira/BaiduPCS-Go/requester"
 	"github.com/iikira/baidu-tools/pan"
 	"net/url"
 	"os"
@@ -125,8 +124,7 @@ func getShareDLink(pcspath string) (dlink string) {
 
 func getLink(shareID int64, shareLink, passwd, rootSharePath, filePath string) (dlink string) {
 	sInfo := pan.NewSharedInfo(shareLink)
-	sInfo.Client = requester.NewHTTPClient()
-	sInfo.Client.SetHTTPSecure(pcsconfig.Config.EnableHTTPS())
+	sInfo.Client = pcsconfig.Config.HTTPClient()
 
 	if passwd != "" {
 		err := sInfo.Auth(passwd)
diff --git a/internal/pcscommand/upload.go b/internal/pcscommand/upload.go
index bed4375c..a1a5fe9c 100644
--- a/internal/pcscommand/upload.go
+++ b/internal/pcscommand/upload.go
@@ -237,15 +237,15 @@ func RunUpload(localPaths []string, savePath string, opt *UploadOptions) {
 		func() {
 			fmt.Printf("[%d] 准备上传: %s\n", task.ID, task.uploadInfo.Path)
 
-			if !task.uploadInfo.OpenPath() {
-				fmt.Printf("[%d] 文件不可读, 跳过...\n", task.ID)
+			err = task.uploadInfo.OpenPath()
+			if err != nil {
+				fmt.Printf("[%d] 文件不可读, 错误信息: %s, 跳过...\n", task.ID, err)
 				return
 			}
 			defer task.uploadInfo.Close() // 关闭文件
 
 			// 步骤控制
 			var (
-				err             error
 				panDir, panFile = path.Split(task.savePath)
 			)
 
diff --git a/main.go b/main.go
index 15119448..f158c348 100644
--- a/main.go
+++ b/main.go
@@ -954,6 +954,7 @@ func main() {
 	通过 BaiduPCS-Go config set -savedir <savedir>, 自定义保存的目录.
 	已支持目录下载.
 	已支持多个文件或目录下载.
+	已支持下载完成后自动校验文件, 但并不是所有的文件都支持校验!
 	自动跳过下载重名的文件!
 
 	示例:
@@ -1002,6 +1003,7 @@ func main() {
 					IsStreaming:          c.Bool("stream"),
 					SaveTo:               saveTo,
 					Parallel:             c.Int("p"),
+					NoCheck:              c.Bool("nocheck"),
 					Load:                 c.Int("l"),
 				}
 
@@ -1058,6 +1060,10 @@ func main() {
 					Name:  "l",
 					Usage: "指定同时进行下载文件的数量",
 				},
+				cli.BoolFlag{
+					Name:  "nocheck",
+					Usage: "下载文件完成后不检测文件的有效性",
+				},
 				cli.BoolFlag{
 					Name:  "bg",
 					Usage: "加入后台下载",
diff --git a/pcsutil/checksum/checksum.go b/pcsutil/checksum/checksum.go
index b4d23ad7..e8d6b946 100644
--- a/pcsutil/checksum/checksum.go
+++ b/pcsutil/checksum/checksum.go
@@ -53,7 +53,7 @@ func NewLocalFileInfo(localPath string, bufSize int) *LocalFile {
 }
 
 // OpenPath 检查文件状态并获取文件的大小 (Length)
-func (lf *LocalFile) OpenPath() bool {
+func (lf *LocalFile) OpenPath() error {
 	if lf.File != nil {
 		lf.File.Close()
 	}
@@ -61,13 +61,17 @@ func (lf *LocalFile) OpenPath() bool {
 	var err error
 	lf.File, err = os.Open(lf.Path)
 	if err != nil {
-		return false
+		return err
+	}
+
+	info, err := lf.File.Stat()
+	if err != nil {
+		return err
 	}
 
-	info, _ := lf.File.Stat()
 	lf.Length = info.Size()
 	lf.ModTime = info.ModTime().Unix()
-	return true
+	return nil
 }
 
 // Close 关闭文件