In order to study the restrain effect of modulating retro-reflector array on atmosphere turbulence and improve the communication quality of atmosphere laser communication system,a transmitting model of modulating retro-reflector array receive beam is established. The signal-to-noise ratio(SNR) of the beam transmitting through the atmosphere to the modulating retro-reflector array is analyzed;A transmitting model of modulating retro-reflector array reflection beams in the atmosphere channel is established. The intensity probability distribution model with different number of reflection beams at receiving end is derived. The bit error rate(BER) of the atmosphere laser communication system based on modulating retro-reflector array under different turbulent environments is analyzed and simulated. The simulated results show that under the condition of medium atmospheric turbulence,the BER of the modulating retro-reflector array consisting of three modulating retro-reflectors is 4 dB lower than a single modulating retro-reflector when the transmission distance is 1 km.