Abstract:In order to address the issues such as wave-front distortion，reflection and other phenomena in atmospheric optical communication，which seriously affect the communication quality，the Adaptive Optics(AO) technology was used to reconstruct the distorted wave-front, then reflective mirrors were used to amend the aberrations．Theoretical analysis, simulation and experiments were performed. The result indicated that under the same experimental conditions, as the Bit Error Ratio(BER) of the system kept the value of 1×10-6，the system transmitting power when using adaptive optics technology had been reduced by half than that when not using adaptive optics technology. In the Near-earth atmospheric laser communications, the effects of AO in increasing the system gain and reducing the system bit error rate are significant.