diff --git a/docs/mindspore/source_zh_cn/migration_guide/model_development/training_and_gradient.ipynb b/docs/mindspore/source_zh_cn/migration_guide/model_development/training_and_gradient.ipynb
index 5c82eef30498b97f7ee3dbd5760b993fd5910f21..61c0af6244ff327de7d7bb5d6475d1f609749440 100644
--- a/docs/mindspore/source_zh_cn/migration_guide/model_development/training_and_gradient.ipynb
+++ b/docs/mindspore/source_zh_cn/migration_guide/model_development/training_and_gradient.ipynb
@@ -129,7 +129,7 @@
     "        self.grad_clip = grad_clip\n",
     "\n",
     "    def construct(self, x, img_shape, gt_bboxe, gt_label, gt_num):\n",
-    "        # 大都数是基类的属性和方法，详情参考对应基类API\n",
+    "        # 大多数是基类的属性和方法，详情参考对应基类API\n",
     "        weights = self.weights\n",
     "        loss = self.network(x, img_shape, gt_bboxe, gt_label, gt_num)\n",
     "        scaling_sens = self.scale_sense\n",