diff --git a/tools/goctl/docker/cmd.go b/tools/goctl/docker/cmd.go
index dbb81682..00ed6d59 100644
--- a/tools/goctl/docker/cmd.go
+++ b/tools/goctl/docker/cmd.go
@@ -21,7 +21,7 @@ var (
 )
 
 func init() {
-	Cmd.Flags().StringVar(&varStringGo, "go", ".", "The directory that contains main function")
+	Cmd.Flags().StringVar(&varStringGo, "go", "", "The file that contains main function")
 	Cmd.Flags().StringVar(&varStringBase, "base", "scratch", "The base image to build the docker image, default scratch")
 	Cmd.Flags().IntVar(&varIntPort, "port", 0, "The port to expose, default none")
 	Cmd.Flags().StringVar(&varStringHome, "home", "", "The goctl home path of the template, --home and --remote cannot be set at the same time, if they are, --remote has higher priority")
diff --git a/tools/goctl/docker/docker.go b/tools/goctl/docker/docker.go
index 500d5aa5..0dbc42f4 100644
--- a/tools/goctl/docker/docker.go
+++ b/tools/goctl/docker/docker.go
@@ -151,17 +151,12 @@ func generateDockerfile(goFile, base string, port int, version, timezone string,
 		builder.WriteString(`, "` + arg + `"`)
 	}
 
-	absGoPath, err := filepath.Abs(goFile)
-	if err != nil {
-		return err
-	}
-
 	t := template.Must(template.New("dockerfile").Parse(text))
 	return t.Execute(out, Docker{
 		Chinese:     env.InChina(),
 		GoRelPath:   projPath,
 		GoFile:      goFile,
-		ExeFile:     filepath.Base(absGoPath),
+		ExeFile:     pathx.FileNameWithoutExt(filepath.Base(goFile)),
 		BaseImage:   base,
 		HasPort:     port > 0,
 		Port:        port,
diff --git a/tools/goctl/docker/docker.tpl b/tools/goctl/docker/docker.tpl
index f9516d9e..250a9dd4 100644
--- a/tools/goctl/docker/docker.tpl
+++ b/tools/goctl/docker/docker.tpl
@@ -15,7 +15,7 @@ ADD go.sum .
 RUN go mod download
 COPY . .
 {{if .Argument}}COPY {{.GoRelPath}}/etc /app/etc
-{{end}}RUN go build -ldflags="-s -w" -o /app/{{.ExeFile}} {{.GoRelPath}}
+{{end}}RUN go build -ldflags="-s -w" -o /app/{{.ExeFile}} {{.GoRelPath}}/{{.GoFile}}
 
 
 FROM {{.BaseImage}}