In order to analyze bit error rate(BER) characteristics of OOK modulation in modulating retro-reflector laser communication system,a modulating retro-reflector laser communication link is established by Optisystem simulation software based on the analysis of echo power model and BER performance.The communication speeds of 100 Mbps and 1 Gbps under the different communication distances and visibilities were simulated by using NRZ,and then BER under different conditions was calculated according to the obtained SNR.Finally,the retro-reflector communication distances under different conditions were gained by combining with the characteristics of eye pattern.The results show that the BER decreases with the increase of atmospheric visibility,and increases with the increase of communication distance.Under the condition of 10 km atmospheric visibility,the modulating retro-reflector system can realize the communication rate of 100 Mbps and communication distance of 2 km.