According to the advantages of the space crank rocker mechanism, the feasibility of applying it to the driving mechanism of the flapping wing aircraft is studied and analyzed. Based on the traditional graphic method, the mathematical model of the drive mechanism is established, and the size of the mechanism is determined by considering the convenient installation and compact structure. The virtual prototype is built for simulation analysis to verify the correctness of the theoretical design. The results show that the drive mechanism can be used as the driving mechanism of the flapping wing aircraft.