The communication rate of coherent laser communication can reach hundreds of Gbps and its receiving sensitivity can be close to the quantum limit,these advantages determine that it has a wide application prospect in the future space-ground integration information network.The optical wave front distortion caused by atmospheric turbulence is a disruptive factor that affects the performance of satellite to ground laser communication.In this paper,we innovatively applied adaptive optics technology to an optical ground receiving station,and 4Gbps coherent laser communication experiment was carried out systematically,the experimental results indicate that adaptive optics can effectively suppress the effect of atmospheric turbulence and improve the sensitivity and stability of the communication system.