diff --git a/tutorials/source_zh_cn/optimization.ipynb b/tutorials/source_zh_cn/optimization.ipynb
index ddfbfdcd276985602aa9c26a3ecb663635ecd0a6..1c3b2ebbe902f711c88f532637706b2bdfc1cc25 100644
--- a/tutorials/source_zh_cn/optimization.ipynb
+++ b/tutorials/source_zh_cn/optimization.ipynb
@@ -111,15 +111,11 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "import numpy as np\n",
-    "\n",
-    "import mindspore.ops as ops\n",
     "import mindspore.dataset as ds\n",
     "import mindspore.dataset.transforms.c_transforms as C\n",
     "import mindspore.dataset.vision.c_transforms as CV\n",
     "from mindspore import nn, Tensor, Model\n",
     "from mindspore import dtype as mstype\n",
-    "from mindspore import Parameter\n",
     "\n",
     "DATA_DIR = \"./datasets/cifar-10-batches-bin/train\"\n",
     "\n",
@@ -152,6 +148,9 @@
     "        return x\n",
     "\n",
     "net = Net()\n",
+    "epochs = 5\n",
+    "batch_size = 64\n",
+    "learning_rate = 1e-3\n",
     "\n",
     "# 构建数据集\n",
     "sampler = ds.SequentialSampler(num_samples=128)\n",