diff --git a/paddle/fluid/operators/detection/generate_proposals_op.cc b/paddle/fluid/operators/detection/generate_proposals_op.cc
index 805ab8aad031887ea9d3d0d269840810b716c9e9..bc48c3b5ba17a21926ceba1bd4c24e339098473d 100644
--- a/paddle/fluid/operators/detection/generate_proposals_op.cc
+++ b/paddle/fluid/operators/detection/generate_proposals_op.cc
@@ -259,7 +259,7 @@ class GenerateProposalsOpMaker : public framework::OpProtoAndCheckerMaker {
              "in format (height, width, scale)");
     AddInput("Anchors",
              "(Tensor) Bounding box anchors from anchor_generator_op "
-             "is in shape (A, H, W, 4).");
+             "is in shape (H, W, A, 4).");
     AddInput("Variances",
              "(Tensor) Bounding box variances with same shape as `Anchors`.");