The radar corner reflector play an important role in ship target defense. How to effectively resist the interference of corner reflectorsis a current research challenge. A typical octahedral corner reflector is selected， and the distribution and statistical characteristics of monostatic and bistatic RCS for single corner reflector and corner reflector array are compared and analyzed through electromagnetic calculation and anechoic chamber experiment in spatial domain and polarization domain. The influence of the geometric relationship between bistatic radar and corner reflector on the RCS of the corner reflector is summarized. The results show that the bistatic RCS of the octahedral corner reflector is much smaller than that of monostatic RCS under the condition of large range bistatic angle， and the mean difference is about 30 dB. Reasonable deployment of bistatic radar can reduce the influence of corner reflector interference effectively， which is useful for resisting the interference of corner reflectors through bistatic radar.