diff --git a/pycorrector/confusion_corrector.py b/pycorrector/confusion_corrector.py
index 585e14ad..1867b858 100644
--- a/pycorrector/confusion_corrector.py
+++ b/pycorrector/confusion_corrector.py
@@ -5,6 +5,7 @@
 功能：1）补充纠错对，提升召回率；2）对误杀加白，提升准确率
 """
 import os
+import re
 from typing import List
 
 from loguru import logger
@@ -56,10 +57,10 @@ def correct(self, sentence: str):
         details = []
         # 自定义混淆集加入疑似错误词典
         for err, truth in self.custom_confusion.items():
-            idx = sentence.find(err)
-            if idx > -1:
-                corrected_sentence = sentence[:idx] + truth + sentence[(idx + len(err)):]
-                details.append((err, truth, idx))
+            for i in re.finditer(err, sentence):
+                start,end = i.span()
+                corrected_sentence = corrected_sentence[:start] + truth + corrected_sentence[end:]
+                details.append((err, truth, start))
         return {'source': sentence, 'target': corrected_sentence, 'errors': details}
 
     def correct_batch(self, sentences: List[str]):
diff --git a/pycorrector/detector.py b/pycorrector/detector.py
index 8dca07c0..7513e308 100644
--- a/pycorrector/detector.py
+++ b/pycorrector/detector.py
@@ -4,6 +4,7 @@
 @description: error word detector
 """
 import os
+import re
 from codecs import open
 
 import numpy as np
@@ -396,9 +397,8 @@ def _detect(self, sentence, start_idx=0, **kwargs):
         self.check_detector_initialized()
         # 1. 自定义混淆集加入疑似错误词典
         for confuse in self.custom_confusion:
-            idx = sentence.find(confuse)
-            if idx > -1:
-                maybe_err = [confuse, idx + start_idx, idx + len(confuse) + start_idx, ErrorType.confusion]
+            for i in re.finditer(confuse, sentence):
+                maybe_err = [confuse, i.span()[0] + start_idx, i.span()[1] + start_idx, ErrorType.confusion]
                 self._add_maybe_error_item(maybe_err, maybe_errors)
 
         # 2. 专名错误检测