Abstract: In the intersatellite coherent optical communication, the vibration of a satellite will lead to a pointing error of transmitting and receiving antennas, which will decrease the signal-to-noise ratio and increase the bit error rate (BER). In this paper, the Rayleigh distribution is taken as the pointing error model caused by satellite vibration， and PSK homodyne communication scheme is used as an example to analyze the influence of the satellite vibration on the system instantaneous BER and average BER. The simulation calculation result of BER is given. It is pointed out that the pointing error of receiving antenna will have a great influence on the quality of the intersatellite optical communication, and the system BER will be less than 10-6 while the standard deviation σ of the pointing error is less than 1μrad.