diff --git a/csst_mci_sim/csst_mci_sim.py b/csst_mci_sim/csst_mci_sim.py
index f044801ed1159850a4cb2c7d573081ecb582fbb3..b09f4454fb3e17c745163c4524403363bee699bd 100644
--- a/csst_mci_sim/csst_mci_sim.py
+++ b/csst_mci_sim/csst_mci_sim.py
@@ -1760,7 +1760,7 @@ class MCIsimulator():
         ####################  cal_PSF_array   #################################         
         
         
-        if self.save_starpsf==False:
+        if self.save_starpsf==100:
             
             self.log.info('calculate and save star PSF data......')
             
@@ -1876,7 +1876,7 @@ class MCIsimulator():
                               [-15.45, 20,    20.5,  20,  19.5, 19, 18.8],
                               [-15.60, 20,    20.5,  20,  19.5, 19, 18.8]])
 
-
+        
         nsrcs=len(self.star['ra_gaia']) + 8
         ################################################################## 
         obj=dict()