diff --git a/routers/private/tool.go b/routers/private/tool.go
index 0e3ea72aa..c7d08430b 100755
--- a/routers/private/tool.go
+++ b/routers/private/tool.go
@@ -5,6 +5,7 @@
 package private
 
 import (
+	"encoding/json"
 	"fmt"
 	"net/http"
 
@@ -68,7 +69,9 @@ func ShowModel(ctx *macaron.Context) {
 	modelResult, count, err := repo.QueryModelByParameters(repoId, 5)
 	if err == nil {
 		log.Info("count=" + fmt.Sprint(count))
-		ctx.JSON(200, modelResult)
+		modelResultjson, _ := json.Marshal(modelResult)
+
+		ctx.JSON(200, (string(modelResultjson)))
 	} else {
 		ctx.JSON(500, "query error.")
 	}