diff --git a/yuthon_property/models/property_meter_archives.py b/yuthon_property/models/property_meter_archives.py
index 9a0030a81..b82793944 100644
--- a/yuthon_property/models/property_meter_archives.py
+++ b/yuthon_property/models/property_meter_archives.py
@@ -226,8 +226,10 @@ class MeterArchivesLine(models.Model):
                 idx = lines.ids.index(line.id)
                 if idx > 0:
                     prev_line = lines[idx - 1]
+                    line.last_read = prev_line.current_read
                     line.last_dosage = (prev_line.current_read or 0) - (prev_line.last_read or 0)
                 else:
+                    line.last_read = 0.0
                     line.last_dosage = 0.0
             else:
                 # 当前记录没有抄表日期，无法计算上次用量
diff --git a/yuthon_property/models/property_meter_water.py b/yuthon_property/models/property_meter_water.py
index 18546e1bc..697dff3b4 100644
--- a/yuthon_property/models/property_meter_water.py
+++ b/yuthon_property/models/property_meter_water.py
@@ -204,6 +204,7 @@ class MeterWaterLine(models.Model):
                 idx = lines.ids.index(line.id)
                 if idx > 0:
                     prev_line = lines[idx - 1]
+                    line.last_read = prev_line.current_read
                     line.last_dosage = (prev_line.current_read or 0) - (prev_line.last_read or 0)
                 else:
                     line.last_dosage = 0.0