diff --git a/func/Module_cut_PSG.py b/func/Module_cut_PSG.py
index 882f241..38aaf75 100644
--- a/func/Module_cut_PSG.py
+++ b/func/Module_cut_PSG.py
@@ -274,7 +274,7 @@ class Data:
                 # 转换切割点
                 ECG_freq = Config["ECGFreq"]
                 raw_freq = self.freq[key]
-                duration_second = ((self.alignInfo["cut_index"]["back_ECG"] - self.alignInfo["cut_index"]["front_ECG"]) // 1000) + 1
+                duration_second = ((self.alignInfo["cut_index"]["back_ECG"] - self.alignInfo["cut_index"]["front_ECG"]) // ECG_freq) + 1
                 start_index_cut = floor(self.alignInfo["cut_index"]["front_ECG"] * (raw_freq / ECG_freq))
                 end_index_cut = start_index_cut + (duration_second * raw_freq)