diff --git a/tools/converter/source/onnx/ROIPoolingOnnx.cpp b/tools/converter/source/onnx/ROIPoolingOnnx.cpp
new file mode 100644
index 00000000..9e4df51e
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+++ b/tools/converter/source/onnx/ROIPoolingOnnx.cpp
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+//
+//  ROIPoolingOnnx.cpp
+//  MNNConverter
+//
+//  Created by MNN on 2021/10/27.
+//  Copyright © 2018, Alibaba Group Holding Limited
+//
+
+#include "onnxOpConverter.hpp"
+
+DECLARE_OP_CONVERTER(ROIPoolingOnnx);
+
+MNN::OpType ROIPoolingOnnx::opType() { return MNN::OpType_ROIPooling; }
+
+MNN::OpParameter ROIPoolingOnnx::type() { return MNN::OpParameter_RoiPooling; }
+
+void ROIPoolingOnnx::run(MNN::OpT *dstOp, const onnx::NodeProto *onnxNode, OnnxScope *scope) {
+    auto roiPool = new MNN::RoiPoolingT;
+
+    const auto attrSize = onnxNode->attribute_size();
+    for (int i = 0; i < attrSize; ++i) {
+        const auto &attributeProto = onnxNode->attribute(i);
+        const auto &attributeName  = attributeProto.name();
+        if (attributeName == "output_size") {
+            DCHECK(attributeProto.type() == ::onnx::AttributeProto_AttributeType_INTS) << "Node Attribute ERROR";
+            DCHECK(attributeProto.ints_size() == 2) << "Node Attribute ERROR";
+            roiPool->pooledHeight = attributeProto.ints(0);
+            roiPool->pooledWidth  = attributeProto.ints(1);
+        } else if (attributeName == "spatial_scale") {
+            DCHECK(attributeProto.type() == ::onnx::AttributeProto_AttributeType_FLOAT) << "Node Attribute ERROR";
+            roiPool->spatialScale = attributeProto.f();
+        } else {
+            DLOG(ERROR) << "TODO!";
+        }
+    }
+
+    dstOp->main.value = roiPool;
+};
+
+REGISTER_CONVERTER(ROIPoolingOnnx, ROIPooling);
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