diff --git a/mace/python/tools/dsp_ops.py b/mace/python/tools/dsp_ops.py
index 4ce90a0b27235914188ba34232c7f5557d44ef75..8589879b6fae0d5468795d0ad466269d7d8a4e2a 100644
--- a/mace/python/tools/dsp_ops.py
+++ b/mace/python/tools/dsp_ops.py
@@ -22,6 +22,7 @@ class DspOps(object):
       'QuantizedSpaceToBatchND': 'QuantizedSpaceToBatchND_8',
       'QuantizedBatchToSpaceND': 'QuantizedBatchToSpaceND_8',
       'QuantizedSoftmax': 'QuantizedSoftmax_8',
+      'QuantizedTanh': 'QuantizedTanh_8',
       'Min': 'Min_f',
       'Max': 'Max_f',
       'QuantizeV2': 'Quantize',
diff --git a/mace/python/tools/tf_dsp_converter_lib.py b/mace/python/tools/tf_dsp_converter_lib.py
index f53c25aa29753593ef21d670a5325a72403347da..7c2da02ab47e215eb2e5c43ec30e83498e2863da 100644
--- a/mace/python/tools/tf_dsp_converter_lib.py
+++ b/mace/python/tools/tf_dsp_converter_lib.py
@@ -164,6 +164,55 @@ def convert_ops(unresolved_ops, resolved_ops, net_def, output_node, dsp_ops):
       op_def.input.extend([input_tensor.name, min_tensor.name, max_tensor.name])
       op_def.out_max_byte_size.extend([max_elem_size(out) for out in quantize_reshape_op.outputs])
       convert_op_outputs(op_def, quantize_reshape_op)
+    elif len(first_op.outputs) > 0 and first_op.type == 'Dequantize' \
+        and len(first_op.outputs[0].consumers()) > 0 \
+        and first_op.outputs[0].consumers()[0].type == 'Tanh':
+      input_tensor = first_op.inputs[0]
+      min_tensor = first_op.inputs[1]
+      max_tensor = first_op.inputs[2]
+      tanh_op = first_op.outputs[0].consumers()[0]
+
+      # if not last op
+      resolved_ops.add(tanh_op.name)
+      if tanh_op.outputs[0].consumers():
+        reshape_op = tanh_op.outputs[0].consumers()[0]
+        min_op = reshape_op.outputs[0].consumers()[0]
+        max_op = reshape_op.outputs[0].consumers()[1]
+        quantize_op = min_op.outputs[0].consumers()[0]
+        resolved_ops.add(reshape_op.name)
+        resolved_ops.add(min_op.name)
+        resolved_ops.add(max_op.name)
+        resolved_ops.add(quantize_op.name)
+
+        op_def.name = quantize_op.name
+        op_def.type = dsp_ops.map_nn_op('Quantized' + tanh_op.type)
+        op_def.input.extend([input_tensor.name, min_tensor.name, max_tensor.name])
+        op_def.out_max_byte_size.extend([max_elem_size(out) for out in quantize_op.outputs])
+        convert_op_outputs(op_def, quantize_op)
+      # tanh is last op
+      else:
+        op_def.name = tanh_op.name + '/QuantizedTanh'
+        op_def.type = dsp_ops.map_nn_op('Quantized' + tanh_op.type)
+        op_def.input.extend([input_tensor.name, min_tensor.name, max_tensor.name])
+        op_def.out_max_byte_size.extend([max_elem_size(input_tensor),
+                                         max_elem_size(min_tensor),
+                                         max_elem_size(max_tensor)])
+        op_def.output_type.extend([mace_pb2.DT_UINT8, mace_pb2.DT_FLOAT, mace_pb2.DT_FLOAT])
+        output_shapes = []
+        for output in first_op.inputs:
+          output_shape = mace_pb2.OutputShape()
+          output_shape.dims.extend(output.shape.as_list())
+          output_shapes.append(output_shape)
+        op_def.output_shape.extend(output_shapes)
+
+        new_tanh_op_def = net_def.op.add()
+        new_tanh_op_def.name = tanh_op.name
+        new_tanh_op_def.type = dsp_ops.map_nn_op('Dequantize')
+        new_tanh_op_def.input.extend([get_tensor_name_from_op(op_def.name, 0),
+                                      get_tensor_name_from_op(op_def.name, 1),
+                                      get_tensor_name_from_op(op_def.name, 2)])
+        new_tanh_op_def.out_max_byte_size.extend([max_elem_size(tanh_op.outputs[0])])
+        convert_op_outputs(new_tanh_op_def, tanh_op)
     elif has_padding_and_strides(first_op):
       op_def.padding = padding_mode[first_op.get_attr('padding')]
       op_def.input.extend([t.name for t in first_op.inputs])