diff --git a/examples/hi_xiaowen/s0/run.sh b/examples/hi_xiaowen/s0/run.sh
index 5254fa8..5a5f074 100755
--- a/examples/hi_xiaowen/s0/run.sh
+++ b/examples/hi_xiaowen/s0/run.sh
@@ -113,9 +113,34 @@ fi
 
 
 if [ ${stage} -le 4 ] && [ ${stop_stage} -ge 4 ]; then
-  python kws/bin/export_jit.py --config $dir/config.yaml \
+  echo "Static quantization, compute FRR/FAR..."
+  # Apply static quantization
+  quantize_score_checkpoint=$(basename $score_checkpoint | sed -e 's:.pt$:.quant.zip:g')
+  cat data/train/data.list | python tools/shuffle_list.py --seed 777 | \
+      head -n 10000 > $dir/calibration.list
+  python kws/bin/static_quantize.py \
+    --config $dir/config.yaml \
+    --test_data $dir/calibration.list \
     --checkpoint $score_checkpoint \
-    --output_file $dir/final.zip \
-    --output_quant_file $dir/final.quant.zip
+    --num_workers 8 \
+    --script_model $dir/$quantize_score_checkpoint
+
+  result_dir=$dir/test_$(basename $quantize_score_checkpoint)
+  mkdir -p $result_dir
+  python kws/bin/score.py \
+    --config $dir/config.yaml \
+    --test_data data/test/data.list \
+    --batch_size 256 \
+    --jit_model \
+    --checkpoint $dir/$quantize_score_checkpoint \
+    --score_file $result_dir/score.txt \
+    --num_workers 8
+  for keyword in 0 1; do
+    python kws/bin/compute_det.py \
+      --keyword $keyword \
+      --test_data data/test/data.list \
+      --score_file $result_dir/score.txt \
+      --stats_file $result_dir/stats.${keyword}.txt
+  done
 fi
 
diff --git a/kws/bin/score.py b/kws/bin/score.py
index 40986d2..5d945f2 100644
--- a/kws/bin/score.py
+++ b/kws/bin/score.py
@@ -58,6 +58,10 @@ def get_args():
     parser.add_argument('--score_file',
                         required=True,
                         help='output score file')
+    parser.add_argument('--jit_model',
+                        action='store_true',
+                        default=False,
+                        help='Use pinned memory buffers used for reading')
     args = parser.parse_args()
     return args
 
@@ -87,12 +91,16 @@ def main():
                                   num_workers=args.num_workers,
                                   prefetch_factor=args.prefetch)
 
-    # Init asr model from configs
-    model = init_model(configs['model'])
-
-    load_checkpoint(model, args.checkpoint)
-    use_cuda = args.gpu >= 0 and torch.cuda.is_available()
-    device = torch.device('cuda' if use_cuda else 'cpu')
+    if args.jit_model:
+        model = torch.jit.load(args.checkpoint)
+        # For script model, only cpu is supported.
+        device = torch.device('cpu')
+    else:
+        # Init asr model from configs
+        model = init_model(configs['model'])
+        load_checkpoint(model, args.checkpoint)
+        use_cuda = args.gpu >= 0 and torch.cuda.is_available()
+        device = torch.device('cuda' if use_cuda else 'cpu')
     model = model.to(device)
 
     model.eval()
diff --git a/kws/bin/static_quantize.py b/kws/bin/static_quantize.py
new file mode 100644
index 0000000..f92e66f
--- /dev/null
+++ b/kws/bin/static_quantize.py
@@ -0,0 +1,134 @@
+# Copyright (c) 2021 Binbin Zhang(binbzha@qq.com)
+#
+# 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.
+
+from __future__ import print_function
+
+import argparse
+import copy
+import logging
+import os
+import sys
+
+import torch
+import yaml
+from torch.utils.data import DataLoader
+
+from kws.dataset.dataset import Dataset
+from kws.model.kws_model import init_model
+from kws.utils.checkpoint import load_checkpoint
+
+
+def get_args():
+    parser = argparse.ArgumentParser(description='recognize with your model')
+    parser.add_argument('--config', required=True, help='config file')
+    parser.add_argument('--test_data', required=True, help='test data file')
+    parser.add_argument('--checkpoint', required=True, help='checkpoint model')
+    parser.add_argument('--num_workers',
+                        default=0,
+                        type=int,
+                        help='num of subprocess workers for reading')
+    parser.add_argument('--pin_memory',
+                        action='store_true',
+                        default=False,
+                        help='Use pinned memory buffers used for reading')
+    parser.add_argument('--prefetch',
+                        default=100,
+                        type=int,
+                        help='prefetch number')
+    parser.add_argument('--script_model',
+                        required=True,
+                        help='output script model')
+    args = parser.parse_args()
+    print(args)
+    return args
+
+
+def main():
+    args = get_args()
+    logging.basicConfig(level=logging.DEBUG,
+                        format='%(asctime)s %(levelname)s %(message)s')
+    os.environ['CUDA_VISIBLE_DEVICES'] = str("-1")
+
+    with open(args.config, 'r') as fin:
+        configs = yaml.load(fin, Loader=yaml.FullLoader)
+
+    test_conf = copy.deepcopy(configs['dataset_conf'])
+    test_conf['filter_conf']['max_length'] = 102400
+    test_conf['filter_conf']['min_length'] = 0
+    test_conf['speed_perturb'] = False
+    test_conf['spec_aug'] = False
+    test_conf['shuffle'] = False
+    test_conf['feature_extraction_conf']['dither'] = 0.0
+    test_conf['batch_conf']['batch_size'] = 1
+
+    test_dataset = Dataset(args.test_data, test_conf)
+    test_data_loader = DataLoader(test_dataset,
+                                  batch_size=None,
+                                  pin_memory=args.pin_memory,
+                                  num_workers=args.num_workers,
+                                  prefetch_factor=args.prefetch)
+
+    # Init asr model from configs
+    model_fp32 = init_model(configs['model'])
+    load_checkpoint(model_fp32, args.checkpoint)
+    # model must be set to eval mode for static quantization logic to work
+    model_fp32.eval()
+
+    # Fuse the activations to preceding layers, where applicable.
+    # This needs to be done manually depending on the model architecture.
+    # Common fusions include `conv + relu` and `conv + batchnorm + relu`
+    print('================ Float 32 ======================')
+    print(model_fp32)
+    print('================ Float 32(fused) ===============')
+    model_fp32.fuse_modules()
+    print(model_fp32)
+
+    # attach a global qconfig, which contains information about what kind
+    # of observers to attach. Use 'fbgemm' for server inference and
+    # 'qnnpack' for mobile inference. Other quantization configurations such
+    # as selecting symmetric or assymetric quantization and MinMax or L2Norm
+    # calibration techniques can be specified here.
+    model_fp32.qconfig = torch.quantization.get_default_qconfig('qnnpack')
+
+    # Prepare the model for static quantization. This inserts observers in
+    # the model that will observe activation tensors during calibration.
+    model_fp32_prepared = torch.quantization.prepare(model_fp32)
+
+    # calibrate the prepared model to determine quantization parameters for
+    # activations in a real world setting, the calibration would be done with
+    # a representative dataset
+    with torch.no_grad():
+        for batch_idx, batch in enumerate(test_data_loader):
+            keys, feats, target, lengths = batch
+            logits = model_fp32_prepared(feats)
+            if batch_idx % 100 == 0:
+                print('Progress utts {}'.format(batch_idx))
+                sys.stdout.flush()
+
+    # Convert the observed model to a quantized model. This does several things:
+    # quantizes the weights, computes and stores the scale and bias value to be
+    # used with each activation tensor, and replaces key operators with
+    # quantized implementations.
+    print('=================== int8  ======================')
+    model_int8 = torch.quantization.convert(model_fp32_prepared)
+    print(model_int8)
+
+    print('================ int8(script) ==================')
+    script_model = torch.jit.script(model_int8)
+    script_model.save(args.script_model)
+    print(script_model)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/tools/shuffle_list.py b/tools/shuffle_list.py
new file mode 100644
index 0000000..8d38c27
--- /dev/null
+++ b/tools/shuffle_list.py
@@ -0,0 +1,48 @@
+#!/usr/bin/env python3
+# Copyright (c) 2021 Binbin Zhang(binbzha@qq.com)
+#
+# 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 argparse
+import random
+import sys
+
+parser = argparse.ArgumentParser(description='shuffle input file by line')
+parser.add_argument('--seed', default=None, type=int, help='random seed')
+parser.add_argument('--input', help='input file')
+parser.add_argument('--output', help='output file')
+args = parser.parse_args()
+
+random.seed(args.seed)
+
+if args.input is not None:
+    fin = open(args.input, 'r', encoding='utf8')
+else:
+    fin = sys.stdin
+
+lines = fin.readlines()
+random.shuffle(lines)
+
+if args.output is not None:
+    fout = open(args.output, 'w', encoding='utf8')
+else:
+    fout = sys.stdout
+
+try:
+    fout.writelines(lines)
+except Exception:
+    pass
+if args.input is not None:
+    fin.close()
+if args.output is not None:
+    fout.close()