Aiming at problem of measurement precision and accuracy of star sensor is seriously affected by stray light existed in geocentric pointing three-axis stabilized satellite

analyze influence of the sunlight and the moon reflected light impact on star sensor during the satellite on-orbit running

on the basics of study on geometric position of the Sun

the Earth

the Moon and the satellite

combine several elements including the satellite attitude information

the star-sensor installation location and field of vision（ FOV）. Moreover

according to the layout of star sensor

recommend plans at different time are discussed and given

which can avoid influences of stray light on star sensor effectively.