diff --git a/src/operators/kernel/fpga/conv_add_bn_kernel.cpp b/src/operators/kernel/fpga/conv_add_bn_kernel.cpp
index 93bbfe9c1a8ae3d9930c759ba0efcef04e5e572f..e624104acf0561470e8aac827c233d0d2d1d9f66 100644
--- a/src/operators/kernel/fpga/conv_add_bn_kernel.cpp
+++ b/src/operators/kernel/fpga/conv_add_bn_kernel.cpp
@@ -61,7 +61,7 @@ bool ConvAddBNKernel<FPGA, float>::Init(FusionConvAddBNParam *param) {
   param->SetNewBias(new_bias);
 
   fpga::quantify_filter(filter);
-  auto filter_ptr = filter->data<float>();
+  auto filter_ptr = filter->data<int8_t>();
 
   fpga::ConvArgs convArgs;
   convArgs.relu_enabled = relu_enabled;
diff --git a/src/operators/kernel/fpga/conv_add_bn_relu_kernel.cpp b/src/operators/kernel/fpga/conv_add_bn_relu_kernel.cpp
index d5e79a39b79494d543e6e9485497a540a15152aa..d6fee838390f0efe38a539c3a9e8fc09d07a68d0 100644
--- a/src/operators/kernel/fpga/conv_add_bn_relu_kernel.cpp
+++ b/src/operators/kernel/fpga/conv_add_bn_relu_kernel.cpp
@@ -57,7 +57,7 @@ bool ConvAddBNReluKernel<FPGA, float>::Init(FusionConvAddBNReluParam *param) {
   param->SetNewScale(new_scale);
   param->SetNewBias(new_bias);
   fpga::quantify_filter(filter);
-  auto filter_ptr = filter->data<float>();
+  auto filter_ptr = filter->data<int8_t>();
 
   fpga::ConvArgs convArgs;
   convArgs.relu_enabled = relu_enabled;
diff --git a/src/operators/kernel/fpga/conv_add_relu_kernel.cpp b/src/operators/kernel/fpga/conv_add_relu_kernel.cpp
index 3b44506f65cc6700323c3d5f7d0765c9e52f7e0a..fd6379d8f3021d9d859d81f75aaba9ad761dd6ca 100644
--- a/src/operators/kernel/fpga/conv_add_relu_kernel.cpp
+++ b/src/operators/kernel/fpga/conv_add_relu_kernel.cpp
@@ -41,7 +41,7 @@ bool ConvAddReluKernel<FPGA, float>::Init(FusionConvAddReluParam *param) {
   }
 
   fpga::quantify_filter(filter);
-  auto filter_ptr = filter->data<float>();
+  auto filter_ptr = filter->data<int8_t>();
 
   fpga::ConvArgs convArgs;
   convArgs.relu_enabled = relu_enabled;
diff --git a/src/operators/kernel/fpga/conv_bn_kernel.cpp b/src/operators/kernel/fpga/conv_bn_kernel.cpp
index fd95f47a1fcb8c444172909abc67ad7f5e0de632..559b948b7b268181dcf75a4eaa40cfd9c78ef0d6 100644
--- a/src/operators/kernel/fpga/conv_bn_kernel.cpp
+++ b/src/operators/kernel/fpga/conv_bn_kernel.cpp
@@ -56,7 +56,7 @@ bool ConvBNKernel<FPGA, float>::Init(FusionConvBNParam *param) {
   param->SetNewScale(new_scale);
   param->SetNewBias(new_bias);
   fpga::quantify_filter(filter);
-  auto filter_ptr = filter->data<float>();
+  auto filter_ptr = filter->data<int8_t>();
 
   fpga::ConvArgs convArgs;
   convArgs.relu_enabled = relu_enabled;
diff --git a/src/operators/kernel/fpga/conv_bn_relu_kernel.cpp b/src/operators/kernel/fpga/conv_bn_relu_kernel.cpp
index fbb3ca512ea863c49ca4da3f9a133f8c91897b53..cfdc85b091017aebaf99d806e6e9104cbcbe05bd 100644
--- a/src/operators/kernel/fpga/conv_bn_relu_kernel.cpp
+++ b/src/operators/kernel/fpga/conv_bn_relu_kernel.cpp
@@ -53,7 +53,7 @@ bool ConvBNReluKernel<FPGA, float>::Init(FusionConvBNReluParam *param) {
   param->SetNewScale(new_scale);
   param->SetNewBias(new_bias);
   fpga::quantify_filter(filter);
-  auto filter_ptr = filter->data<float>();
+  auto filter_ptr = filter->data<int8_t>();
 
   fpga::ConvArgs convArgs;
   convArgs.relu_enabled = relu_enabled;