diff --git a/doc/Dialects/onnx.md b/doc/Dialects/onnx.md
index 69349aa..e4ca150 100644
--- a/doc/Dialects/onnx.md
+++ b/doc/Dialects/onnx.md
@@ -2848,6 +2848,32 @@ ONNX PRelu operation
 
 1. `Y`: memref of any type values or tensor of any type values
 
+### onnx.PadConstantPad (ONNXPadConstantPadOp)
+ONNX Pad operation with constant padding value
+
+#### Description:
+
+
+"this operation is introduced to handle situation"
+   " in which the padding value and padding are constants"
+   "They will become attributes."
+
+#### Operands:
+
+1. `data`: memref of any type values or tensor of any type values
+1. `constant_value`: memref of any type values or tensor of any type values
+
+#### Attributes:
+
+| Attribute | MLIR Type | Description |
+| :-------: | :-------: | ----------- |
+| `pads` | `ArrayAttr` | 64-bit integer array attribute attribute |
+| `mode` | `StringAttr` | string attribute attribute |
+
+#### Results:
+
+1. `output`: memref of any type values or tensor of any type values
+
 ### onnx.PadConstantValue (ONNXPadConstantValueOp)
 ONNX Pad operation with constant padding value
 
@@ -2876,7 +2902,7 @@ ONNX Pad operation with constant padding value
 
 1. `output`: memref of any type values or tensor of any type values
 
-### onnx.PadConstatValuePad (ONNXPadConstantValuePadOp)
+### onnx.PadConstantValuePad (ONNXPadConstantValuePadOp)
 ONNX Pad operation with constant padding value
 
 #### Description:
diff --git a/src/dialect/onnx/onnx.td b/src/dialect/onnx/onnx.td
index 1cc88c3..1dde6cc 100644
--- a/src/dialect/onnx/onnx.td
+++ b/src/dialect/onnx/onnx.td
@@ -169,8 +169,22 @@ def ONNXPadConstantValueOp : ONNX_Op<"PadConstantValue",
   let results = (outs AnyTypeOf<[AnyMemRef, AnyTensor]>:$output);
 }
 
-def ONNXPadConstantValuePadOp : ONNX_Op<"PadConstatValuePad",
-    [NoSideEffect ]> {
+def ONNXPadConstantPadOp : ONNX_Op<"PadConstantPad",
+    [NoSideEffect, DeclareOpInterfaceMethods<ShapeInferenceOpInterface> ]> {
+  let summary = "ONNX Pad operation with constant padding value";
+  let description = [{ "this operation is introduced to handle situation"
+    " in which the padding value and padding are constants"
+    "They will become attributes."
+   }];
+  let arguments = (ins AnyTypeOf<[AnyMemRef, AnyTensor]>:$data,
+           AnyTypeOf<[AnyMemRef, AnyTensor]>:$constant_value,
+           I64ArrayAttr:$pads,
+           DefaultValuedAttr<StrAttr, "constant">:$mode);
+  let results = (outs AnyTypeOf<[AnyMemRef, AnyTensor]>:$output);
+}
+
+def ONNXPadConstantValuePadOp : ONNX_Op<"PadConstantValuePad",
+    [NoSideEffect, DeclareOpInterfaceMethods<ShapeInferenceOpInterface> ]> {
   let summary = "ONNX Pad operation with constant padding value";
   let description = [{ "this operation is introduced to handle situation"
     " in which the padding value and padding are constants"
diff --git a/src/dialect/onnx/onnx_ops.cpp b/src/dialect/onnx/onnx_ops.cpp
index ed18086..5474856 100644
--- a/src/dialect/onnx/onnx_ops.cpp
+++ b/src/dialect/onnx/onnx_ops.cpp
@@ -1045,6 +1045,57 @@ void ONNXMaxPoolSingleOutOp::inferShapes() {
 
 //===----------------------------------------------------------------------===//
 
+static Type padShapeInferenceHelper(Value data, ArrayAttr padsOpt) {
+  // Cannot infer shape if no shape exists.
+  if (!data.getType().isa<RankedTensorType>())
+    return (Type)NULL;
+  auto dataTy = data.getType().cast<RankedTensorType>();
+  auto dataShape = dataTy.getShape();
+  auto dataRank = dataShape.size();
+  SmallVector<int64_t, 4> outputShape(dataShape.begin(), dataShape.end());
+  if (padsOpt) {
+    auto padsArray = padsOpt.getValue();
+    // Pads consists of two values for each axis of data.
+    // The two values specify the number of elements padded before and after respectively.
+    for (int i = 0; i < dataRank; ++i) {
+      int64_t p1 = (padsArray[2*i]).cast<IntegerAttr>().getInt();
+      int64_t p2 = (padsArray[2*i+1]).cast<IntegerAttr>().getInt();
+      //Have to non-negative constant
+      if (p1 < 0 || p2 <0) 
+        return (Type)NULL;
+      outputShape[i] += p1+p2;
+    }
+
+    return (RankedTensorType::get(outputShape, dataTy.getElementType()));
+  } else {
+    return (Type)NULL;
+  }
+}
+
+// PadConstantPad
+
+void ONNXPadConstantPadOp::inferShapes(){
+  auto outputType = padShapeInferenceHelper(data(), pads());
+  if (outputType) {
+    getResult().setType(outputType);
+  } 
+  return;
+}
+
+//===----------------------------------------------------------------------===//
+
+// PadConstantValuePad
+
+void ONNXPadConstantValuePadOp::inferShapes(){
+  auto outputType = padShapeInferenceHelper(data(), pads());
+  if (outputType) {
+    getResult().setType(outputType);
+  } 
+  return;
+}
+
+//===----------------------------------------------------------------------===//
+
 // Unsqueeze
 
 void ONNXUnsqueezeOp::inferShapes() {
diff --git a/src/pass/shape_inference_pass.cpp b/src/pass/shape_inference_pass.cpp
index 4038ec3..47826af 100644
--- a/src/pass/shape_inference_pass.cpp
+++ b/src/pass/shape_inference_pass.cpp
@@ -127,6 +127,8 @@ public:
         op->getName().getStringRef() != "onnx.Softmax" &&
         op->getName().getStringRef() != "onnx.Sqrt" &&
         op->getName().getStringRef() != "onnx.ConvNoBias" &&
+        op->getName().getStringRef() != "onnx.PadConstantPad" &&
+        op->getName().getStringRef() != "onnx.PadConstantValuePad" &&
         op->getName().getStringRef() != "onnx.BatchNormalizationTestMode" &&
         op->getName().getStringRef() != "onnx.Unsqueeze")
       return false;
diff --git a/test/mlir/onnx/onnx_canonicalization.mlir b/test/mlir/onnx/onnx_canonicalization.mlir
index 840cd7d..a535a33 100644
--- a/test/mlir/onnx/onnx_canonicalization.mlir
+++ b/test/mlir/onnx/onnx_canonicalization.mlir
@@ -87,7 +87,7 @@ func @test_reducesumsquare(%arg0 : tensor<?x?x?xf32>) -> tensor<*xf32> {
 
 // CHECK-LABEL: @test_constant_pad(%{{.*}}: tensor<?x?xf32>) -> tensor<*xf32> {
 func @test_constant_pad(%arg0 : tensor<?x?xf32>) -> tensor<*xf32> {
-  // CHECK-NEXT: [[SQUARE:%.+]] = "onnx.PadConstatValuePad"(%arg0) {constant_value = 0.000000e+00 : f32, mode = "constant", pads = [0, 2, 0, 0]} : (tensor<?x?xf32>) -> tensor<*xf32> 
+  // CHECK-NEXT: [[SQUARE:%.+]] = "onnx.PadConstantValuePad"(%arg0) {constant_value = 0.000000e+00 : f32, mode = "constant", pads = [0, 2, 0, 0]} : (tensor<?x?xf32>) -> tensor<*xf32> 
   %0 ="onnx.Constant"() {value=[0, 2, 0, 0]} : ()-> tensor<?xi64>
   %2 = "onnx.PadConstantValue"(%arg0, %0) {constant_value=0. : f32, mode = "constant"} : (tensor<?x?xf32>, tensor<?xi64>)-> tensor<*xf32>
   "std.return"(%2) : (tensor<*xf32>) -> ()
@@ -97,7 +97,7 @@ func @test_constant_pad(%arg0 : tensor<?x?xf32>) -> tensor<*xf32> {
 func @test_conv_split(%arg0 : tensor<1x9x32x64xf32>, %arg1 : tensor<5x9x6x7xf32>) -> tensor<*xf32> {
   %0 = "onnx.ConvNoBias"(%arg0, %arg1) {auto_pad = "NOTSET", group = 1 : i64, pads = [2, 3, 4, 5]} : (tensor<1x9x32x64xf32>, tensor<5x9x6x7xf32>) -> tensor<*xf32>
   "std.return"(%0) : (tensor<*xf32>) -> ()
-  // CHECK-NEXT: %0 = "onnx.PadConstatValuePad"(%arg0) {constant_value = 0.000000e+00 : f32, mode = "constant", pads = [0, 0, 2, 3, 0, 0, 4, 5]} : (tensor<1x9x32x64xf32>) -> tensor<1x9x38x72xf32>
+  // CHECK-NEXT: %0 = "onnx.PadConstantValuePad"(%arg0) {constant_value = 0.000000e+00 : f32, mode = "constant", pads = [0, 0, 2, 3, 0, 0, 4, 5]} : (tensor<1x9x32x64xf32>) -> tensor<1x9x38x72xf32>
   // CHECK-NEXT: %1 = "onnx.ConvNoBias"(%0, %arg1) {auto_pad = "NOTSET", group = 1 : i64, pads = [0, 0, 0, 0]} : (tensor<1x9x38x72xf32>, tensor<5x9x6x7xf32>) -> tensor<*xf32>
   // CHECK-NEXT: return %1 : tensor<*xf32>
 }
diff --git a/test/mlir/onnx/onnx_shape_inference.mlir b/test/mlir/onnx/onnx_shape_inference.mlir
index fbd718c..f3c82eb 100644
--- a/test/mlir/onnx/onnx_shape_inference.mlir
+++ b/test/mlir/onnx/onnx_shape_inference.mlir
@@ -269,8 +269,27 @@ func @test_conv_no_bias_10(%arg0 : tensor<1x2x32x64xf32>, %arg1 : tensor<5x2x6x7
 func @test_conv_no_bias_11(%arg0 : tensor<1x2x32x64xf32>, %arg1 : tensor<5x2x6x7xf32>) -> tensor<*xf32> {
   %0 = "onnx.ConvNoBias"(%arg0, %arg1) {auto_pad = "SAME_UPPER", group = 1 : i64, dilations = [2, 3]} : (tensor<1x2x32x64xf32>, tensor<5x2x6x7xf32>) -> tensor<*xf32>
   "std.return"(%0) : (tensor<*xf32>) -> ()
-
+}
   // CHECK-LABEL: test_conv_no_bias_11
   // CHECK: [[RES_ATTR:%.+]] = "onnx.ConvNoBias"(%arg0, %arg1) {auto_pad = "SAME_UPPER", dilations = [2, 3], group = 1 : i64} : (tensor<1x2x32x64xf32>, tensor<5x2x6x7xf32>) -> tensor<1x5x32x64xf32>
   // CHECK: return [[RES_ATTR]] : tensor<1x5x32x64xf32>
+
+
+/// Test PadConstantValuePad_1
+func @test_PadConstantValuePad_1(%arg0 : tensor<16x13xf32>) -> tensor<*xf32> {
+  %0 = "onnx.PadConstantValuePad"(%arg0) {constant_value = 0.000000e+00 : f32, mode = "constant", pads = [0, 2, 0, 0]} : (tensor<16x13xf32>) -> tensor<*xf32>
+  "std.return"(%0) : (tensor<*xf32>) -> ()
 }
+// CHECK-LABEL: test_PadConstantValuePad_1
+// CHECK: [[RES:%.+]] = "onnx.PadConstantValuePad"(%arg0) {constant_value = 0.000000e+00 : f32, mode = "constant", pads = [0, 2, 0, 0]} : (tensor<16x13xf32>) -> tensor<18x13xf32>
+// CHECK: return [[RES]] : tensor<18x13xf32>
+
+/// Test PadConstantPad_1
+func @test_PadConstantPad_1(%arg0 : tensor<16x13xf32>, %arg1 : tensor<*xf32>) -> tensor<*xf32> {
+  %0 = "onnx.PadConstantPad"(%arg0, %arg1) {mode = "constant", pads = [0, 2, 3, 1]} : (tensor<16x13xf32>, tensor<*xf32>) -> tensor<*xf32>
+  "std.return"(%0) : (tensor<*xf32>) -> ()
+}
+// CHECK-LABEL: test_PadConstantPad_1
+// CHECK: [[RES:%.+]] = "onnx.PadConstantPad"(%arg0, %arg1) {mode = "constant", pads = [0, 2, 3, 1]} : (tensor<16x13xf32>, tensor<*xf32>) -> tensor<18x17xf32>
+// CHECK: return [[RES]] : tensor<18x17xf32>
+