diff --git a/paddle/fluid/lite/core/op_registry.cc b/paddle/fluid/lite/core/op_registry.cc
index 8c3e44733df0f868a5881e1c0d3140a2ea5cf518..131bdc641d06dffeae35c218be8a5984601d23b2 100644
--- a/paddle/fluid/lite/core/op_registry.cc
+++ b/paddle/fluid/lite/core/op_registry.cc
@@ -96,6 +96,7 @@ KernelRegistry::KernelRegistry()
   INIT_FOR(kX86, kAny, kAny);
 
   INIT_FOR(kARM, kFloat, kNCHW);
+  INIT_FOR(kARM, kInt8, kNCHW);
   INIT_FOR(kARM, kAny, kNCHW);
   INIT_FOR(kARM, kAny, kAny);
 #undef INIT_FOR
diff --git a/paddle/fluid/lite/kernels/arm/calib_compute.cc b/paddle/fluid/lite/kernels/arm/calib_compute.cc
index c64ebdc13db9794587a179d645543fdef595dc8f..78500048ec7e2b153a81512fb902609220393b16 100644
--- a/paddle/fluid/lite/kernels/arm/calib_compute.cc
+++ b/paddle/fluid/lite/kernels/arm/calib_compute.cc
@@ -50,7 +50,7 @@ void CalibCompute::Run() {
 }  // namespace lite
 }  // namespace paddle
 
-REGISTER_LITE_KERNEL(calib, kARM, kAny, kAny,
+REGISTER_LITE_KERNEL(calib, kARM, kInt8, kNCHW,
                      paddle::lite::kernels::arm::CalibCompute, def)
     .BindInput("Input", {LiteType::GetTensorTy(TARGET(kARM))})
     .BindOutput("Out", {LiteType::GetTensorTy(TARGET(kARM))})
diff --git a/paddle/fluid/lite/kernels/arm/calib_compute.h b/paddle/fluid/lite/kernels/arm/calib_compute.h
index 898e1ce6383d34e54e0d58e6a38a3bcdf20bdfb7..d2811cd23a943f63862d98401d25bb74e44016bf 100644
--- a/paddle/fluid/lite/kernels/arm/calib_compute.h
+++ b/paddle/fluid/lite/kernels/arm/calib_compute.h
@@ -21,12 +21,10 @@ namespace lite {
 namespace kernels {
 namespace arm {
 
-class CalibCompute : public KernelLite<TARGET(kARM), PRECISION(kAny)> {
+class CalibCompute : public KernelLite<TARGET(kARM), PRECISION(kInt8)> {
  public:
   using param_t = operators::CalibParam;
 
-  // void PrepareForRun() override;
-
   void Run() override;
 
   ~CalibCompute() override{};
diff --git a/paddle/fluid/lite/kernels/arm/calib_compute_test.cc b/paddle/fluid/lite/kernels/arm/calib_compute_test.cc
index 68bbd94b9b37c0d006223400b6f57d32f6eea4ab..96dd3740eebeea4b6edf427713178c8817c2be62 100644
--- a/paddle/fluid/lite/kernels/arm/calib_compute_test.cc
+++ b/paddle/fluid/lite/kernels/arm/calib_compute_test.cc
@@ -84,14 +84,14 @@ void calib_ref(const operators::CalibParam& param) {
 TEST(calib_arm, retrive_op) {
   auto calib =
       KernelRegistry::Global()
-          .Create<TARGET(kARM), PRECISION(kAny), DATALAYOUT(kAny)>("calib");
+          .Create<TARGET(kARM), PRECISION(kInt8), DATALAYOUT(kNCHW)>("calib");
   ASSERT_FALSE(calib.empty());
   ASSERT_TRUE(calib.front());
 }
 
 TEST(calib_arm, init) {
   CalibCompute calib;
-  ASSERT_EQ(calib.precision(), PRECISION(kAny));
+  ASSERT_EQ(calib.precision(), PRECISION(kInt8));
   ASSERT_EQ(calib.target(), TARGET(kARM));
 }
 
@@ -146,4 +146,4 @@ TEST(calib_arm, int8_to_fp32) {
 }  // namespace lite
 }  // namespace paddle
 
-USE_LITE_KERNEL(calib, kARM, kAny, kAny, def);
+USE_LITE_KERNEL(calib, kARM, kInt8, kNCHW, def);
diff --git a/paddle/fluid/lite/operators/calib_op.h b/paddle/fluid/lite/operators/calib_op.h
index ef6e94c4c12950558c1419ed274394eb2b475978..1d93f6ea9a5abf3b42811b809870d3c645d029bb 100644
--- a/paddle/fluid/lite/operators/calib_op.h
+++ b/paddle/fluid/lite/operators/calib_op.h
@@ -27,6 +27,13 @@ namespace paddle {
 namespace lite {
 namespace operators {
 
+/*
+ * The data types used by the two adjacent layers in the model should
+ * be the same. When the two operators accept different data types,
+ * we may need to implicitly add a data type conversion operator.
+ * Currently, this operator only supports mutual conversion of int8
+ * and float32 types.
+ */
 class CalibOpLite : public OpLite {
  public:
   CalibOpLite() {}
@@ -37,14 +44,6 @@ class CalibOpLite : public OpLite {
 
   bool InferShape() const override;
 
-  /*
-  bool Run() override {
-    CHECK(kernel_);
-    kernel_->Run();
-    return true;
-  }
-   */
-
   bool AttachImpl(const cpp::OpDesc &opdesc, lite::Scope *scope);
 
   void AttachKernel(KernelBase *kernel) override { kernel->SetParam(param_); }
diff --git a/paddle/fluid/lite/operators/calib_op_test.cc b/paddle/fluid/lite/operators/calib_op_test.cc
index 2b54352059a8abf86122c5803fb2d48a52fa3b3f..1b65c8e0dc014e4b5e532caf44b391880afabd1f 100644
--- a/paddle/fluid/lite/operators/calib_op_test.cc
+++ b/paddle/fluid/lite/operators/calib_op_test.cc
@@ -48,9 +48,9 @@ TEST(calib_op_lite, TestARM) {
 
   CalibOpLite calib("calib");
 
-  calib.SetValidPlaces({Place{TARGET(kARM), PRECISION(kAny)}});
+  calib.SetValidPlaces({Place{TARGET(kARM), PRECISION(kInt8)}});
   calib.Attach(desc, &scope);
-  auto kernels = calib.CreateKernels({Place{TARGET(kARM), PRECISION(kAny)}});
+  auto kernels = calib.CreateKernels({Place{TARGET(kARM), PRECISION(kInt8)}});
   ASSERT_FALSE(kernels.empty());
 }
 #endif
@@ -60,5 +60,5 @@ TEST(calib_op_lite, TestARM) {
 }  // namespace paddle
 
 #ifdef LITE_WITH_ARM
-USE_LITE_KERNEL(calib, kARM, kAny, kAny, def);
+USE_LITE_KERNEL(calib, kARM, kInt8, kNCHW, def);
 #endif