diff --git a/examples/readme.md b/examples/readme.md
index 1f287c698ede398b1165a8717073e5f46fafb8a6..c1746d860432bff38aa60fce3f8dfd7491de2343 100644
--- a/examples/readme.md
+++ b/examples/readme.md
@@ -35,11 +35,6 @@
         <td><a href="./activation/softmaxgradfront"> softmaxgradfront</td>
         <td> 对输入tensor按行做如下公式的计算：zi = (xi - ∑(xi * yi)) * yi，其中∑为按行reduce求和。</td>
     </tr>
-    <tr>
-        <th rowspan="1"><a href="./index"> index</th>
-        <td><a href="./index/arithprogression"> arithprogression</td>
-        <td> 基于给定的起始值，等差值和长度，返回一个等差数列。 </td>
-    </tr>
     <tr>
         <th rowspan="23"><a href="./matrix"> matrix</th>
         <td><a href="./matrix/basic_block_matmul"> basic_block_matmul</td>