diff --git a/csst_mci_sim/csst_mci_sim.py b/csst_mci_sim/csst_mci_sim.py
index 89dfac15c564764521b5a62d7ebd3983fefa7b82..19088ebe8e4d6db59c82c6ad596d626d8a643d16 100644
--- a/csst_mci_sim/csst_mci_sim.py
+++ b/csst_mci_sim/csst_mci_sim.py
@@ -2537,7 +2537,7 @@ class MCIsimulator():
         wave0, zodi0 = self.zodiacal(ra, dec, self.TianCe_day)     # erg/s/cm^2/A/arcsec^2
         
         # EarthShine from straylight
-        sl = StrayLight(jtime=time_jd, sat=np.array([x_sat, y_sat, z_sat]),
+        sl = StrayLight(self.information['dir_path'], jtime=time_jd, sat=np.array([x_sat, y_sat, z_sat]),
                         radec=np.array([(ra*u.degree).value, (dec*u.degree).value]))
 
         earth_e = sl.caculateEarthShineFilter(filter='r')