diff --git a/g/net/ghttp/ghttp_client_request.go b/g/net/ghttp/ghttp_client_request.go
index 1108587cc..a1330b9a8 100644
--- a/g/net/ghttp/ghttp_client_request.go
+++ b/g/net/ghttp/ghttp_client_request.go
@@ -15,6 +15,9 @@ import (
     "mime/multipart"
     "os"
     "io"
+    "gitee.com/johng/gf/g/os/gfile"
+    "errors"
+    "fmt"
 )
 
 // http客户端
@@ -74,8 +77,12 @@ func (c *Client) Post(url, data string) (*ClientResponse, error) {
         for _, item := range strings.Split(data, "&") {
             array := strings.Split(item, "=")
             if len(array[1]) > 6 && strings.Compare(array[1][0:6], "@file:") == 0 {
-                if file, err := writer.CreateFormFile(array[0], array[1][6:]); err == nil {
-                    if f, err := os.Open(array[1][6:]); err == nil {
+                path := array[1][6:]
+                if !gfile.Exists(path) {
+                    return nil, errors.New(fmt.Sprintf(`"%s" does not exist`, path))
+                }
+                if file, err := writer.CreateFormFile(array[0], path); err == nil {
+                    if f, err := os.Open(path); err == nil {
                         defer f.Close()
                         if _, err = io.Copy(file, f); err != nil {
                             return nil, err
diff --git a/g/net/ghttp/ghttp_func.go b/g/net/ghttp/ghttp_func.go
index 6fa79afba..74e28bcaf 100644
--- a/g/net/ghttp/ghttp_func.go
+++ b/g/net/ghttp/ghttp_func.go
@@ -6,7 +6,10 @@
 
 package ghttp
 
-import "gitee.com/johng/gf/g/encoding/gurl"
+import (
+    "gitee.com/johng/gf/g/encoding/gurl"
+    "strings"
+)
 
 // 构建请求参数，将参数进行urlencode编码
 func BuildParams(params map[string]string) string {
@@ -15,7 +18,11 @@ func BuildParams(params map[string]string) string {
         if len(s) > 0 {
             s += "&"
         }
-        s += k + "=" + gurl.Encode(v)
+        if len(v) > 6 && strings.Compare(v[0 : 6], "@file:") == 0 {
+            s += k + "=" + v
+        } else {
+            s += k + "=" + gurl.Encode(v)
+        }
     }
     return s
 }
\ No newline at end of file