diff --git a/backend/services/spider.go b/backend/services/spider.go
index e97c7992..fe162f12 100644
--- a/backend/services/spider.go
+++ b/backend/services/spider.go
@@ -12,12 +12,11 @@ import (
 	"github.com/apex/log"
 	"github.com/globalsign/mgo"
 	"github.com/globalsign/mgo/bson"
-	uuid "github.com/satori/go.uuid"
+	"github.com/satori/go.uuid"
 	"github.com/spf13/viper"
 	"os"
 	"path/filepath"
 	"runtime/debug"
-	"strings"
 )
 
 type SpiderFileData struct {
@@ -192,21 +191,14 @@ func PublishSpider(spider model.Spider) {
 	md5 := filepath.Join(path, spider_handler.Md5File)
 	if !utils.Exists(md5) {
 		log.Infof("md5 file not found: %s", md5)
-		spiderSync.RemoveSpiderFile()
-		spiderSync.Download()
-		spiderSync.CreateMd5File(gfFile.Md5)
+		spiderSync.RemoveDownCreate(gfFile.Md5)
 		return
 	}
 	// md5值不一样，则下载
-	md5Str := utils.ReadFileOneLine(md5)
-	// 去掉空格以及换行符
-	md5Str = strings.Replace(md5Str, " ", "", -1)
-	md5Str = strings.Replace(md5Str, "\n", "", -1)
+	md5Str := utils.GetSpiderMd5Str(md5)
 	if gfFile.Md5 != md5Str {
 		log.Infof("md5 is different, gf-md5:%s, file-md5:%s", gfFile.Md5, md5Str)
-		spiderSync.RemoveSpiderFile()
-		spiderSync.Download()
-		spiderSync.CreateMd5File(gfFile.Md5)
+		spiderSync.RemoveDownCreate(gfFile.Md5)
 		return
 	}
 }
diff --git a/backend/services/spider_handler/spider.go b/backend/services/spider_handler/spider.go
index c3a2500d..cd8a1dbe 100644
--- a/backend/services/spider_handler/spider.go
+++ b/backend/services/spider_handler/spider.go
@@ -38,6 +38,12 @@ func (s *SpiderSync) CreateMd5File(md5 string) {
 	}
 }
 
+func (s *SpiderSync) RemoveDownCreate(md5 string) {
+	s.RemoveSpiderFile()
+	s.Download()
+	s.CreateMd5File(md5)
+}
+
 // 获得下载锁的key
 func (s *SpiderSync) GetLockDownloadKey(spiderId string) string {
 	node, _ := model.GetCurrentNode()
diff --git a/backend/services/task.go b/backend/services/task.go
index b41f0d81..15513977 100644
--- a/backend/services/task.go
+++ b/backend/services/task.go
@@ -7,6 +7,7 @@ import (
 	"crawlab/lib/cron"
 	"crawlab/model"
 	"crawlab/services/notification"
+	"crawlab/services/spider_handler"
 	"crawlab/utils"
 	"encoding/json"
 	"errors"
@@ -450,15 +451,9 @@ func ExecuteTask(id int) {
 	t.Status = constants.StatusRunning                   // 任务状态
 	t.WaitDuration = t.StartTs.Sub(t.CreateTs).Seconds() // 等待时长
 
-	// 判断爬虫文件是否存在
-	gfFile := model.GetGridFs(spider.FileId)
-	if gfFile == nil {
-		t.Error = "找不到爬虫文件，请重新上传"
-		t.Status = constants.StatusError
-		t.FinishTs = time.Now()                                 // 结束时间
-		t.RuntimeDuration = t.FinishTs.Sub(t.StartTs).Seconds() // 运行时长
-		t.TotalDuration = t.FinishTs.Sub(t.CreateTs).Seconds()  // 总时长
-		_ = t.Save()
+	// 文件检查
+	if err := SpiderFileCheck(t, spider); err != nil {
+		log.Errorf("spider file check error: %s", err.Error())
 		return
 	}
 
@@ -538,6 +533,30 @@ func ExecuteTask(id int) {
 	log.Infof(GetWorkerPrefix(id) + "任务(ID:" + t.Id + ")" + "执行完毕. 消耗时间:" + durationStr + "秒")
 }
 
+func SpiderFileCheck(t model.Task, spider model.Spider) error {
+	// 判断爬虫文件是否存在
+	gfFile := model.GetGridFs(spider.FileId)
+	if gfFile == nil {
+		t.Error = "找不到爬虫文件，请重新上传"
+		t.Status = constants.StatusError
+		t.FinishTs = time.Now()                                 // 结束时间
+		t.RuntimeDuration = t.FinishTs.Sub(t.StartTs).Seconds() // 运行时长
+		t.TotalDuration = t.FinishTs.Sub(t.CreateTs).Seconds()  // 总时长
+		_ = t.Save()
+		return errors.New(t.Error)
+	}
+
+	// 判断md5值是否一致
+	path := filepath.Join(viper.GetString("spider.path"), spider.Name)
+	md5File := filepath.Join(path, spider_handler.Md5File)
+	md5 := utils.GetSpiderMd5Str(md5File)
+	if gfFile.Md5 != md5 {
+		spiderSync := spider_handler.SpiderSync{Spider: spider}
+		spiderSync.RemoveDownCreate(gfFile.Md5)
+	}
+	return nil
+}
+
 func GetTaskLog(id string) (logStr string, err error) {
 	task, err := model.GetTask(id)
 
@@ -680,19 +699,6 @@ func AddTask(t model.Task) error {
 	return nil
 }
 
-func HandleTaskError(t model.Task, err error) {
-	log.Error("handle task error:" + err.Error())
-	t.Status = constants.StatusError
-	t.Error = err.Error()
-	t.FinishTs = time.Now()
-	if err := t.Save(); err != nil {
-		log.Errorf(err.Error())
-		debug.PrintStack()
-		return
-	}
-	debug.PrintStack()
-}
-
 func GetTaskEmailMarkdownContent(t model.Task, s model.Spider) string {
 	n, _ := model.GetNode(t.NodeId)
 	errMsg := ""
diff --git a/backend/utils/file.go b/backend/utils/file.go
index c71b2cb0..bfe92bd3 100644
--- a/backend/utils/file.go
+++ b/backend/utils/file.go
@@ -33,7 +33,14 @@ func ReadFileOneLine(fileName string) string {
 		return ""
 	}
 	return line
+}
 
+func GetSpiderMd5Str(file string) string {
+	md5Str := ReadFileOneLine(file)
+	// 去掉空格以及换行符
+	md5Str = strings.Replace(md5Str, " ", "", -1)
+	md5Str = strings.Replace(md5Str, "\n", "", -1)
+	return md5Str
 }
 
 // 创建文件