diff --git a/python/rapidocr_onnxruntime/config.yaml b/python/rapidocr_onnxruntime/config.yaml
index 3bd206126..a8da9cc5e 100644
--- a/python/rapidocr_onnxruntime/config.yaml
+++ b/python/rapidocr_onnxruntime/config.yaml
@@ -7,7 +7,13 @@ Global:
     min_height: 30
     width_height_ratio: 8
 
+    intra_op_num_threads: &intra_nums -1
+    inter_op_num_threads: &inter_nums -1
+
 Det:
+    intra_op_num_threads: *intra_nums
+    inter_op_num_threads: *inter_nums
+
     use_cuda: false
 
     model_path: models/ch_PP-OCRv4_det_infer.onnx
@@ -23,6 +29,9 @@ Det:
     score_mode: fast
 
 Cls:
+    intra_op_num_threads: *intra_nums
+    inter_op_num_threads: *inter_nums
+
     use_cuda: false
 
     model_path: models/ch_ppocr_mobile_v2.0_cls_infer.onnx
@@ -33,6 +42,9 @@ Cls:
     label_list: ['0', '180']
 
 Rec:
+    intra_op_num_threads: *intra_nums
+    inter_op_num_threads: *inter_nums
+
     use_cuda: false
 
     model_path: models/ch_PP-OCRv4_rec_infer.onnx
diff --git a/python/rapidocr_onnxruntime/utils.py b/python/rapidocr_onnxruntime/utils.py
index 2e6efa8f4..778066dd7 100644
--- a/python/rapidocr_onnxruntime/utils.py
+++ b/python/rapidocr_onnxruntime/utils.py
@@ -3,6 +3,7 @@
 # @Contact: liekkaskono@163.com
 import argparse
 import math
+import os
 import random
 import traceback
 import warnings
@@ -33,6 +34,15 @@ def __init__(self, config):
         sess_opt.enable_cpu_mem_arena = False
         sess_opt.graph_optimization_level = GraphOptimizationLevel.ORT_ENABLE_ALL
 
+        cpu_nums = os.cpu_count()
+        intra_op_num_threads = config.get("intra_op_num_threads", -1)
+        if intra_op_num_threads != -1 and 1 <= intra_op_num_threads <= cpu_nums:
+            sess_opt.intra_op_num_threads = intra_op_num_threads
+
+        inter_op_num_threads = config.get("inter_op_num_threads", -1)
+        if inter_op_num_threads != -1 and 1 <= inter_op_num_threads <= cpu_nums:
+            sess_opt.inter_op_num_threads = inter_op_num_threads
+
         cpu_ep = "CPUExecutionProvider"
         cpu_provider_options = {
             "arena_extend_strategy": "kSameAsRequested",