diff --git a/ppdet/modeling/layers.py b/ppdet/modeling/layers.py
index ba9a385e145040fb3301e1d670b2c1e33dc1c123..4afc7f560d1b69ed690eec05d53efd40283a33d5 100644
--- a/ppdet/modeling/layers.py
+++ b/ppdet/modeling/layers.py
@@ -749,7 +749,6 @@ class TTFBox(object):
         # batch size is 1
         scores_r = paddle.reshape(scores, [cat, -1])
         topk_scores, topk_inds = paddle.topk(scores_r, k)
-        topk_scores, topk_inds = paddle.topk(scores_r, k)
         topk_ys = topk_inds // width
         topk_xs = topk_inds % width