In order to track with the beacon facular real time and high precisely for fine tracking system in space light communication,a suit of fine tracking control flat based on high frame frequency CMOS camera is designed,and image processing and control algorithms are all integrated into the large scale FPGA chip.Fuzzy reasoning rules are combined with general PID algorithm,which improve the control precision of nonlinear system.Kalman predictor is combined with fuzzy PID algorithm,which realizes real-time and forward control for FSM.Field experiment result shows that the system is capable of restraining outside disturbance,realizing exact tracking facular weak object,and it has the characteristics of high-speed response,high-precision stability and powerful ability of anti-jamming.