diff --git a/public/react/src/modules/user/account/ChangeHeaderPicModal.js b/public/react/src/modules/user/account/ChangeHeaderPicModal.js
index 08b4e9d18..997d99357 100644
--- a/public/react/src/modules/user/account/ChangeHeaderPicModal.js
+++ b/public/react/src/modules/user/account/ChangeHeaderPicModal.js
@@ -39,11 +39,27 @@ class ChangeHeaderPicModal extends Component{
             URL.revokeObjectURL(uploadedImageURL);
           }
           const image = document.getElementById( imageId );
-          image.src = uploadedImageURL = URL.createObjectURL(file);
-          that.refs['cropper'].renew(image)
-          // cropper.destroy();
-          // cropper = new Cropper(image, options);
-          inputImage.value = null;
+
+          // base64
+          var reader = new FileReader();
+          reader.readAsBinaryString(file);
+
+          reader.onload = () => {
+              let base64_content = btoa(reader.result);
+              console.log();
+              
+              image.src = `data:${file.type};base64,${base64_content}` // uploadedImageURL = URL.createObjectURL(file);
+              that.fileUploaded = true;
+              that.refs['cropper'].renew(image)
+              // cropper.destroy();
+              // cropper = new Cropper(image, options);
+              inputImage.value = null;
+          };
+          reader.onerror = function() {
+              console.log('there are some problems');
+          };
+
+          
         } else {
           this.props.showNotification && this.props.showNotification("请选择一个图片格式的文件")
           // window.alert('Please choose an image file.');
@@ -57,6 +73,8 @@ class ChangeHeaderPicModal extends Component{
 
     this.refs['modalWrapper'].setVisible(visible)
     if (visible) {
+      this.fileUploaded = false;
+
       setTimeout(() => {
         this.init()
       }, 500)
@@ -69,7 +87,12 @@ class ChangeHeaderPicModal extends Component{
   }
 
   onOk = () => {
-    var img_lg = document.getElementById(previewId);           
+    if (this.fileUploaded != true) {
+      this.props.showNotification("请先上传图片")
+      return;
+    }
+    var img_lg = document.getElementById(previewId);      
+    // https://github.com/niklasvh/html2canvas/issues/1908     
     // 截图小的显示框内的内容          
     window.html2canvas(img_lg).then((canvas) => {
       var dataUrl = canvas.toDataURL("image/jpeg");