diff --git a/apps/wpm/services.py b/apps/wpm/services.py
index 1dbf5e96..7c5f8d20 100644
--- a/apps/wpm/services.py
+++ b/apps/wpm/services.py
@@ -134,7 +134,7 @@ def get_pcoal_heat(year_s: int, month_s: int, day_s: int):
                                    mgroup__name='回转窑', shift__name__in=['白班', '早班'])  # hardcode
             if qs.pcoal_heat is None or qs.pcoal_heat <=0:
                 s = SfLog.objects.filter(pcoal_heat__isnull=False).order_by('-start_time').first()
-                if s:
+                if s and s.pcoal_heat:
                     qs.pcoal_heat = s.pcoal_heat
                 else:
                     qs.pcoal_heat = 25000