diff --git a/utils/Quality_Relabel.py b/utils/Quality_Relabel.py
index 9e7d05c..a4c53ba 100644
--- a/utils/Quality_Relabel.py
+++ b/utils/Quality_Relabel.py
@@ -279,7 +279,7 @@ class Quality_Relabel:
         # 获取BCG事件开始与结束时间
         bcg_SP = one_bcg_data["new_start"]
         bcg_EP = one_bcg_data["new_end"]
-        bcg_duration = int(float(str(one_bcg_data["Duration"]).split("(")[0]))
+        bcg_duration = bcg_EP - bcg_SP
 
         logging.info(f"sampNo:{self.sampNo} "
                      f"bcg[index:{bcg_index} epoch:{one_bcg_data['Epoch']} event:{one_bcg_data['Event type']}] "
@@ -312,7 +312,7 @@ class Quality_Relabel:
         # 绘制 Flow2
         plt.subplot(gs[1])
         self.plt_channel(plt_=plt, SP=ecg_SP, EP=ecg_EP, channel="Flow P",
-                         title=f"PSG sampNo:{self.sampNo} Epoch:{one_ecg_data['Epoch']} Duration:{one_ecg_data['Duration']}")
+                         title=f"PSG sampNo:{self.sampNo} Epoch:{one_ecg_data['Epoch']} Duration:{ecg_duration}")
 
         plt.subplot(gs[2])
         self.plt_channel(plt_=plt, SP=ecg_SP, EP=ecg_EP, channel="Effort Tho")
@@ -329,7 +329,7 @@ class Quality_Relabel:
         plt.subplot(gs[6])
         self.plt_channel(plt_=plt, SP=bcg_SP, EP=bcg_EP, channel="0.7lowpass_resp", event_show_under=False,
                          ax_bottom=True,
-                         title=f"心晓 sampNo:{self.sampNo} Epoch:{one_bcg_data['Epoch']} Duration:{one_bcg_data['Duration']}",
+                         title=f"心晓 sampNo:{self.sampNo} Epoch:{one_bcg_data['Epoch']} Duration:{bcg_duration}",
                          )
 
         figManager = plt.get_current_fig_manager()