diff --git a/deploy/cpp_infer/tools/config.txt b/deploy/cpp_infer/tools/config.txt
index 24e4ef0de7d844ba4bd6c11f2cba08766c0e5ddf..28085ca408d279fc61a1bce1abf1df9c05115c78 100644
--- a/deploy/cpp_infer/tools/config.txt
+++ b/deploy/cpp_infer/tools/config.txt
@@ -3,7 +3,7 @@ use_gpu 0
 gpu_id  0
 gpu_mem  4000
 cpu_math_library_num_threads  10
-use_mkldnn 0
+use_mkldnn 1
 
 # det config
 max_side_len  960