diff --git a/paddle/fluid/operators/amp/update_loss_scaling_op_npu.cc b/paddle/fluid/operators/amp/update_loss_scaling_op_npu.cc
new file mode 100644
index 0000000000000000000000000000000000000000..1385a3182fd34bc6ea5a4f6521eaef95d854eb27
--- /dev/null
+++ b/paddle/fluid/operators/amp/update_loss_scaling_op_npu.cc
@@ -0,0 +1,219 @@
+/* Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#include "paddle/fluid/operators/amp/update_loss_scaling_op.h"
+#include <cmath>
+#include <vector>
+#include "paddle/fluid/framework/op_registry.h"
+#include "paddle/fluid/operators/npu_op_runner.h"
+
+namespace paddle {
+namespace operators {
+
+using Tensor = framework::Tensor;
+
+template <typename T>
+void Update(const platform::NPUDeviceContext& ctx,
+            const std::vector<bool> found_inf_vec,
+            const Tensor* pre_loss_scaling_tensor, const Tensor* good_in_tensor,
+            const Tensor* bad_in_tensor, const int incr_every_n_steps,
+            const int decr_every_n_nan_or_inf, const float incr_ratio,
+            const float decr_ratio, Tensor* updated_loss_scaling_tensor,
+            Tensor* good_out_tensor, Tensor* bad_out_tensor) {
+  auto place = ctx.GetPlace();
+  auto stream = ctx.stream();
+  if (found_inf_vec[0]) {
+    // good_out_data = 0
+    auto g = good_out_tensor->mutable_data<int>(place);
+    platform::NPUMemsetAsync(static_cast<void*>(g), 0,
+                             good_out_tensor->numel() * sizeof(int), stream);
+    // bad_out_data = bad_in_data + 1
+    Tensor factor_tensor(bad_out_tensor->type());
+    factor_tensor.mutable_data<int>({1}, place);
+    TensorFromVector(std::vector<int>{1}, ctx, &factor_tensor);
+    auto runner_p2 = NpuOpRunner("Add", {*bad_in_tensor, factor_tensor},
+                                 {*bad_out_tensor}, {});
+    runner_p2.Run(stream);
+
+    std::vector<int> bad_out_data;
+    TensorToVector(*bad_out_tensor, ctx, &bad_out_data);
+    if (bad_out_data[0] == decr_every_n_nan_or_inf) {
+      auto runner_p3 = NpuOpRunner("Power", {*pre_loss_scaling_tensor},
+                                   {*updated_loss_scaling_tensor},
+                                   {{"power", static_cast<float>(1)},
+                                    {"scale", decr_ratio},
+                                    {"shift", static_cast<float>(0)}});
+
+      runner_p3.Run(stream);
+
+      std::vector<T> new_loss_scaling;
+      TensorToVector(*updated_loss_scaling_tensor, ctx, &new_loss_scaling);
+      if (new_loss_scaling[0] < static_cast<T>(1)) {
+        // updated_loss_scaling_data = 1
+        auto runner_p4 = NpuOpRunner("Power", {*pre_loss_scaling_tensor},
+                                     {*updated_loss_scaling_tensor},
+                                     {{"power", static_cast<float>(1)},
+                                      {"scale", static_cast<float>(0)},
+                                      {"shift", static_cast<float>(1)}});
+
+        runner_p4.Run(stream);
+      }
+
+      // bad_out_data = 0
+      auto b = bad_out_tensor->mutable_data<int>(place);
+      platform::NPUMemsetAsync(static_cast<void*>(b), 0,
+                               bad_out_tensor->numel() * sizeof(int), stream);
+    }
+  } else {
+    // bad_out_data = 0
+    auto b = bad_out_tensor->mutable_data<int>(place);
+    platform::NPUMemsetAsync(static_cast<void*>(b), 0,
+                             bad_out_tensor->numel() * sizeof(int), stream);
+
+    // good_out_data = good_in_data + 1
+    Tensor factor_tensor(good_out_tensor->type());
+    factor_tensor.mutable_data<int>({1}, place);
+    TensorFromVector(std::vector<int>{1}, ctx, &factor_tensor);
+    auto runner_p2 = NpuOpRunner("Add", {*good_in_tensor, factor_tensor},
+                                 {*good_out_tensor}, {});
+    runner_p2.Run(stream);
+
+    std::vector<int> good_out_data;
+    TensorToVector(*good_out_tensor, ctx, &good_out_data);
+
+    if (good_out_data[0] == incr_every_n_steps) {
+      auto runner_p3 = NpuOpRunner("Power", {*pre_loss_scaling_tensor},
+                                   {*updated_loss_scaling_tensor},
+                                   {{"power", static_cast<float>(1)},
+                                    {"scale", incr_ratio},
+                                    {"shift", static_cast<float>(0)}});
+      runner_p3.Run(stream);
+
+      std::vector<T> new_loss_scaling;
+      TensorToVector(*updated_loss_scaling_tensor, ctx, &new_loss_scaling);
+      if (!std::isfinite(new_loss_scaling[0])) {
+        // updated_loss_scaling_data = pre_loss_scaling_data
+        auto runner_p4 = NpuOpRunner("Power", {*pre_loss_scaling_tensor},
+                                     {*updated_loss_scaling_tensor},
+                                     {{"power", static_cast<float>(1)},
+                                      {"scale", static_cast<float>(1)},
+                                      {"shift", static_cast<float>(0)}});
+
+        runner_p4.Run(stream);
+      }
+      // good_out_data = 0
+      auto g = good_out_tensor->mutable_data<int>(place);
+      platform::NPUMemsetAsync(static_cast<void*>(g), 0,
+                               good_out_tensor->numel() * sizeof(int), stream);
+    }
+  }
+}
+
+template <typename T>
+class UpdateLossScalingFunctor<platform::NPUDeviceContext, T> {
+ public:
+  void operator()(const platform::NPUDeviceContext& dev_ctx,
+                  const std::vector<bool> found_inf_vec,
+                  const Tensor* pre_loss_scaling_tensor,
+                  const Tensor* good_in_tensor, const Tensor* bad_in_tensor,
+                  const int incr_every_n_steps,
+                  const int decr_every_n_nan_or_inf, const float incr_ratio,
+                  const float decr_ratio, Tensor* updated_loss_scaling_tensor,
+                  Tensor* good_out_tensor, Tensor* bad_out_tensor) const {
+    Update<T>(dev_ctx, found_inf_vec, pre_loss_scaling_tensor, good_in_tensor,
+              bad_in_tensor, incr_every_n_steps, decr_every_n_nan_or_inf,
+              incr_ratio, decr_ratio, updated_loss_scaling_tensor,
+              good_out_tensor, bad_out_tensor);
+  }
+};
+
+template <typename T>
+class LazyZerosNPU {
+ public:
+  void operator()(const platform::NPUDeviceContext& dev_ctx,
+                  const std::vector<bool> found_inf_vec,
+                  const std::vector<const framework::Tensor*>& xs,
+                  const std::vector<framework::Tensor*>& outs) const {
+    for (size_t i = 0; i < xs.size(); ++i) {
+      auto* out = outs[i];
+      if (found_inf_vec[0]) {
+        VLOG(1) << "-- UpdateLossScaling: Find infinite grads. --";
+
+        auto place = dev_ctx.GetPlace();
+        auto stream = dev_ctx.stream();
+        auto g = out->mutable_data<int>(place);
+        platform::NPUMemsetAsync(static_cast<void*>(g), 0,
+                                 out->numel() * sizeof(int), stream);
+      }
+    }
+  }
+};
+
+template <typename DeviceContext, typename T>
+class UpdateLossScalingNPUKernel : public framework::OpKernel<T> {
+  using MPDType = typename details::MPTypeTrait<T>::Type;
+
+ public:
+  void Compute(const framework::ExecutionContext& ctx) const override {
+    auto& dev_ctx = ctx.template device_context<DeviceContext>();
+
+    const auto xs = ctx.MultiInput<framework::Tensor>("X");
+    auto outs = ctx.MultiOutput<framework::Tensor>("Out");
+    const auto* found_inf = ctx.Input<Tensor>("FoundInfinite");
+    PADDLE_ENFORCE_EQ(found_inf->numel(), 1,
+                      platform::errors::InvalidArgument(
+                          "FoundInfinite must has only one element."));
+
+    std::vector<bool> found_inf_vec;
+    TensorToVector(*found_inf, ctx.device_context(), &found_inf_vec);
+
+    LazyZerosNPU<T>{}(dev_ctx, found_inf_vec, xs, outs);
+    const bool stop_update = ctx.Attr<bool>("stop_update");
+    if (stop_update) {
+      return;
+    }
+
+    const auto* pre_loss_scaling = ctx.Input<Tensor>("PrevLossScaling");
+    const auto* good_in = ctx.Input<Tensor>("InGoodSteps");
+    const auto* bad_in = ctx.Input<Tensor>("InBadSteps");
+    auto* updated_loss_scaling = ctx.Output<Tensor>("LossScaling");
+    auto* good_out = ctx.Output<Tensor>("OutGoodSteps");
+    auto* bad_out = ctx.Output<Tensor>("OutBadSteps");
+
+    updated_loss_scaling->mutable_data<MPDType>(dev_ctx.GetPlace());
+    good_out->mutable_data<int>(dev_ctx.GetPlace());
+    bad_out->mutable_data<int>(dev_ctx.GetPlace());
+
+    const int incr_every_n_steps = ctx.Attr<int>("incr_every_n_steps");
+    const int decr_every_n_nan_or_inf =
+        ctx.Attr<int>("decr_every_n_nan_or_inf");
+    const float incr_ratio = ctx.Attr<float>("incr_ratio");
+    const float decr_ratio = ctx.Attr<float>("decr_ratio");
+    UpdateLossScalingFunctor<DeviceContext, MPDType>{}(
+        dev_ctx, found_inf_vec, pre_loss_scaling, good_in, bad_in,
+        incr_every_n_steps, decr_every_n_nan_or_inf, incr_ratio, decr_ratio,
+        updated_loss_scaling, good_out, bad_out);
+  }
+};
+
+}  // namespace operators
+}  // namespace paddle
+
+namespace ops = paddle::operators;
+
+REGISTER_OP_NPU_KERNEL(
+    update_loss_scaling,
+    ops::UpdateLossScalingNPUKernel<paddle::platform::NPUDeviceContext, float>,
+    ops::UpdateLossScalingNPUKernel<paddle::platform::NPUDeviceContext,
+                                    double>);
diff --git a/python/paddle/fluid/tests/unittests/npu/test_update_loss_scaling_op_npu.py b/python/paddle/fluid/tests/unittests/npu/test_update_loss_scaling_op_npu.py
new file mode 100644
index 0000000000000000000000000000000000000000..1060e67078f8d827618c782c8b413e861bf4d68a
--- /dev/null
+++ b/python/paddle/fluid/tests/unittests/npu/test_update_loss_scaling_op_npu.py
@@ -0,0 +1,268 @@
+#   Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import unittest
+import numpy as np
+import sys
+sys.path.append("..")
+from op_test import OpTest
+import paddle
+import paddle.fluid as fluid
+import paddle.fluid.contrib.mixed_precision.amp_nn as amp_nn
+
+paddle.enable_static()
+SEED = 2021
+
+
+@unittest.skipIf(not paddle.is_compiled_with_npu(),
+                 "core is not compiled with NPU")
+class TestUpdateLossScalingOp(OpTest):
+    def setUp(self):
+        self.set_npu()
+        self.op_type = "update_loss_scaling"
+        self.place = paddle.NPUPlace(0)
+
+        self.init()
+        found_inf = np.array([False], dtype=np.bool)
+        x = np.random.random((1024, 1024)).astype(self.dtype)
+
+        self.inputs = {
+            'X': [('x0', x)],
+            'FoundInfinite': found_inf,
+            'PrevLossScaling': self.prev_loss_scaling,
+            'InGoodSteps': self.num_good_steps,
+            'InBadSteps': self.num_bad_steps
+        }
+
+        self.outputs = {
+            'Out': [('out0', x)],
+            'LossScaling': self.prev_loss_scaling * self.incr_ratio,
+            'OutGoodSteps': self.zero_steps,
+            'OutBadSteps': self.zero_steps
+        }
+
+    def set_npu(self):
+        self.__class__.use_npu = True
+
+    def init(self):
+        self.incr_ratio = 2.0
+        self.decr_ratio = 0.8
+        self.dtype = np.float32
+        self.prev_loss_scaling = np.array([2048]).astype(self.dtype)
+        self.num_good_steps = np.array([999], dtype=np.int32)
+        self.num_bad_steps = np.array([1], dtype=np.int32)
+        self.zero_steps = np.array([0], dtype=np.int32)
+        self.attrs = {
+            'incr_every_n_steps': 1000,
+            'decr_every_n_nan_or_inf': 2,
+            'incr_ratio': self.incr_ratio,
+            'decr_ratio': self.decr_ratio,
+        }
+
+    def test_check_output(self):
+        self.check_output_with_place(
+            self.place, check_dygraph=False, no_check_set=['Out'])
+
+
+class TestUpdateLossScalingOpBad(TestUpdateLossScalingOp):
+    def setUp(self):
+        self.set_npu()
+        self.op_type = "update_loss_scaling"
+        self.place = paddle.NPUPlace(0)
+
+        self.init()
+        found_inf = np.array([True], dtype=np.bool)
+        x = np.random.random((1024, 1024)).astype(self.dtype)
+        i = np.random.randint(0, 1024, 1)
+        j = np.random.randint(0, 1024, 1)
+        x[i[0]][j[0]] = np.inf
+
+        self.inputs = {
+            'X': [('x0', x)],
+            'FoundInfinite': found_inf,
+            'PrevLossScaling': self.prev_loss_scaling,
+            'InGoodSteps': self.num_good_steps,
+            'InBadSteps': self.num_bad_steps
+        }
+
+        self.outputs = {
+            'Out': [('out0', np.zeros_like(x))],
+            'LossScaling': self.prev_loss_scaling * self.decr_ratio,
+            'OutGoodSteps': self.zero_steps,
+            'OutBadSteps': self.zero_steps
+        }
+
+    def test_check_output(self):
+        self.check_output_with_place(self.place, check_dygraph=False)
+
+
+@unittest.skipIf(not paddle.is_compiled_with_npu(),
+                 "core is not compiled with NPU")
+class TestUpdateLossScalingLayer(unittest.TestCase):
+    def loss_scaling_check(self, use_npu=True, scope=fluid.Scope()):
+        a = fluid.data(name="a", shape=[1024, 1024], dtype='float32')
+        b = fluid.data(name="b", shape=[512, 128], dtype='float32')
+        x = [a, b]
+        found_inf = fluid.data(name="found_inf", shape=[1], dtype='bool')
+        prev_loss_scaling = fluid.data(
+            name="prev_loss_scaling", shape=[1], dtype='float32')
+        num_good_steps = fluid.data(
+            name="num_good_steps", shape=[1], dtype='int32')
+        num_bad_steps = fluid.data(
+            name="num_bad_steps", shape=[1], dtype='int32')
+
+        a_v = np.random.random([1024, 1024]).astype('float32')
+        b_v = np.random.random([512, 128]).astype('float32')
+        found_inf_v = np.array([False]).astype('bool')
+        prev_loss_scaling_v = np.array([2048]).astype('float32')
+        num_good_steps_v = np.array([999], dtype=np.int32)
+        num_bad_steps_v = np.array([1], dtype=np.int32)
+
+        incr_every_n_steps = 1000
+        decr_every_n_nan_or_inf = 2
+        incr_ratio = 2
+        decr_ratio = 0.8
+
+        result = amp_nn.update_loss_scaling(
+            x,
+            found_inf,
+            prev_loss_scaling,
+            num_good_steps,
+            num_bad_steps,
+            incr_every_n_steps,
+            decr_every_n_nan_or_inf,
+            incr_ratio,
+            decr_ratio,
+            name="update_loss_scaling")
+
+        place = paddle.NPUPlace(0) if use_npu else fluid.CPUPlace()
+        exe = fluid.Executor(place)
+        with fluid.scope_guard(scope):
+            exe.run(fluid.default_startup_program())
+            result_v = exe.run(feed={
+                'a': a_v,
+                'b': b_v,
+                'found_inf': found_inf_v,
+                'prev_loss_scaling': prev_loss_scaling_v,
+                'num_good_steps': num_good_steps_v,
+                'num_bad_steps': num_bad_steps_v
+            },
+                               fetch_list=[
+                                   result, x, found_inf, prev_loss_scaling,
+                                   num_good_steps, num_bad_steps
+                               ])
+        assert np.array_equal(result_v[0], a_v)
+        assert np.array_equal(result_v[1], b_v)
+        assert np.array_equal(result_v[0], result_v[2])
+        assert np.array_equal(result_v[1], result_v[3])
+        assert np.array_equal(result_v[4], found_inf_v)
+        assert np.array_equal(result_v[5], prev_loss_scaling_v * incr_ratio)
+        assert np.array_equal(result_v[6], np.zeros_like(num_good_steps_v))
+        assert np.array_equal(result_v[7], np.zeros_like(num_bad_steps_v))
+
+    def loss_scaling_check_inf(self, use_npu=True, scope=fluid.Scope()):
+        a = fluid.data(name="a", shape=[1024, 1024], dtype='float32')
+        b = fluid.data(name="b", shape=[512, 128], dtype='float32')
+        x = [a, b]
+        found_inf = fluid.data(name="found_inf", shape=[1], dtype='bool')
+        prev_loss_scaling = fluid.data(
+            name="prev_loss_scaling", shape=[1], dtype='float32')
+        num_good_steps = fluid.data(
+            name="num_good_steps", shape=[1], dtype='int32')
+        num_bad_steps = fluid.data(
+            name="num_bad_steps", shape=[1], dtype='int32')
+
+        a_v = np.random.random([1024, 1024]).astype('float32')
+        b_v = np.random.random([512, 128]).astype('float32')
+        i = np.random.randint(0, 1024, 1)
+        j = np.random.randint(0, 1024, 1)
+        a_v[i[0]][j[0]] = np.inf
+        found_inf_v = np.array([True]).astype('bool')
+        prev_loss_scaling_v = np.array([2048]).astype('float32')
+        num_good_steps_v = np.array([999], dtype=np.int32)
+        num_bad_steps_v = np.array([1], dtype=np.int32)
+
+        incr_every_n_steps = 1000
+        decr_every_n_nan_or_inf = 2
+        incr_ratio = 2
+        decr_ratio = 0.8
+
+        result = amp_nn.update_loss_scaling(
+            x,
+            found_inf,
+            prev_loss_scaling,
+            num_good_steps,
+            num_bad_steps,
+            incr_every_n_steps,
+            decr_every_n_nan_or_inf,
+            incr_ratio,
+            decr_ratio,
+            name="update_loss_scaling")
+
+        place = paddle.NPUPlace(0) if use_npu else fluid.CPUPlace()
+        exe = fluid.Executor(place)
+        with fluid.scope_guard(scope):
+            exe.run(fluid.default_startup_program())
+            result_v = exe.run(feed={
+                'a': a_v,
+                'b': b_v,
+                'found_inf': found_inf_v,
+                'prev_loss_scaling': prev_loss_scaling_v,
+                'num_good_steps': num_good_steps_v,
+                'num_bad_steps': num_bad_steps_v
+            },
+                               fetch_list=[
+                                   result, x, found_inf, prev_loss_scaling,
+                                   num_good_steps, num_bad_steps
+                               ])
+        assert np.array_equal(result_v[0], np.zeros_like(a_v))
+        assert np.array_equal(result_v[1], np.zeros_like(b_v))
+        assert np.array_equal(result_v[2], np.zeros_like(a_v))
+        assert np.array_equal(result_v[3], np.zeros_like(b_v))
+        assert np.array_equal(result_v[4], found_inf_v)
+        assert np.array_equal(result_v[5], prev_loss_scaling_v * decr_ratio)
+        assert np.array_equal(result_v[6], np.zeros_like(num_good_steps_v))
+        assert np.array_equal(result_v[7], np.zeros_like(num_bad_steps_v))
+
+    def test_loss_scaling_cpu(self):
+        main = fluid.Program()
+        startup = fluid.Program()
+        with fluid.unique_name.guard():
+            with fluid.program_guard(main, startup):
+                self.loss_scaling_check(use_npu=False)
+
+    def test_loss_scaling_cpu_inf(self):
+        main = fluid.Program()
+        startup = fluid.Program()
+        with fluid.unique_name.guard():
+            with fluid.program_guard(main, startup):
+                self.loss_scaling_check_inf(use_npu=False)
+
+    def test_loss_scaling_npu(self):
+        main = fluid.Program()
+        startup = fluid.Program()
+        with fluid.unique_name.guard():
+            with fluid.program_guard(main, startup):
+                self.loss_scaling_check(use_npu=True)
+
+    def test_loss_scaling_npu_inf(self):
+        main = fluid.Program()
+        startup = fluid.Program()
+        with fluid.unique_name.guard():
+            with fluid.program_guard(main, startup):
+                self.loss_scaling_check_inf(use_npu=True)
+
+
+if __name__ == '__main__':
+    unittest.main()