diff --git a/doc/fluid/api_cn/layers_cn/retinanet_target_assign_cn.rst b/doc/fluid/api_cn/layers_cn/retinanet_target_assign_cn.rst
index 895433d93fe0a6d4e10ac85aedb464ab78fe074b..cd37a297b2b303429ee17ad9f2f2881245041ebe 100644
--- a/doc/fluid/api_cn/layers_cn/retinanet_target_assign_cn.rst
+++ b/doc/fluid/api_cn/layers_cn/retinanet_target_assign_cn.rst
@@ -68,9 +68,9 @@ retinanet_target_assign
     gt_boxes = fluid.data(name='gt_boxes', shape=[10, 4],
                       dtype='float32')
     gt_labels = fluid.data(name='gt_labels', shape=[10, 1],
-                      dtype='float32')
+                      dtype='int32')
     is_crowd = fluid.data(name='is_crowd', shape=[1],
-                      dtype='float32')
+                      dtype='int32')
     im_info = fluid.data(name='im_info', shape=[1, 3],
                       dtype='float32')
     score_pred, loc_pred, score_target, loc_target, bbox_inside_weight, fg_num = \