Abstract: Based on the fact that some units of CPR1000 series cannot complete the calibration of the set point on the Intermediate Range Channel at 48%Pn due to the current saturation, and considering the outage economic, a new method for the set points calibration of the intermediate range is studied and analyzed by MCNP program and the nuclear design software package SCEINCE. The analysis results show that the set points calibration of the intermediate range can be adjusted to 30%Pn platform, and the set points calibrated by the improved method is closer to the design value.