diff --git a/develop/doc/api/v2/fluid/layers.html b/develop/doc/api/v2/fluid/layers.html
index 9bff403012c90f1e6d91484bbd75da02e2e1e52f..76d0aadce57545cce6a1fe653cfa420fff2868db 100644
--- a/develop/doc/api/v2/fluid/layers.html
+++ b/develop/doc/api/v2/fluid/layers.html
@@ -846,7 +846,7 @@ Duplicable: False  Optional: False</td>
 <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
 <li><strong>x</strong> &#8211; (Tensor) Input tensor of scale operator.
 Duplicable: False  Optional: False</li>
-<li><strong>scale</strong> (<em>FLOAT</em>) &#8211; (float, default 0)The scaling factor of the scale operator.</li>
+<li><strong>scale</strong> (<em>FLOAT</em>) &#8211; (float, default 1.0)The scaling factor of the scale operator.</li>
 </ul>
 </td>
 </tr>
diff --git a/develop/doc/operators.json b/develop/doc/operators.json
index a5dbd3f8ff677850347b819352eec46ce045c6ca..a7c83ec22cc3bc271105a061d25eec7779302235 100644
--- a/develop/doc/operators.json
+++ b/develop/doc/operators.json
@@ -3316,7 +3316,7 @@
  { 
    "name" : "scale",
    "type" : "float",
-   "comment" : "(float, default 0)The scaling factor of the scale operator.",
+   "comment" : "(float, default 1.0)The scaling factor of the scale operator.",
    "generated" : 0
  } ] 
 },{
diff --git a/develop/doc_cn/api/v2/fluid/layers.html b/develop/doc_cn/api/v2/fluid/layers.html
index 72f493a2260dd7fa33f6277e86d00a63fd65717a..1d5253ff4d0e9275418bf8f79b8c9f2b3630a45b 100644
--- a/develop/doc_cn/api/v2/fluid/layers.html
+++ b/develop/doc_cn/api/v2/fluid/layers.html
@@ -865,7 +865,7 @@ Duplicable: False  Optional: False</td>
 <tr class="field-odd field"><th class="field-name">参数:</th><td class="field-body"><ul class="first simple">
 <li><strong>x</strong> &#8211; (Tensor) Input tensor of scale operator.
 Duplicable: False  Optional: False</li>
-<li><strong>scale</strong> (<em>FLOAT</em>) &#8211; (float, default 0)The scaling factor of the scale operator.</li>
+<li><strong>scale</strong> (<em>FLOAT</em>) &#8211; (float, default 1.0)The scaling factor of the scale operator.</li>
 </ul>
 </td>
 </tr>