Reasonable and lightweight design of aviation driving mechanism can greatly improve the accuracy of travel angle control, durability, torque / mass ratio and electromagnetic compatibility of aviation driving mechanism, and reduce the output shaft sloshing clearance. Based on the current domestic existing aircraft landing lights by air driving mechanism, put forward a king of lightweight aircraft design drive mechanism, the scheme adopts brushless dc motor drive, through the planetary gear, parallel shaft spur gear and worm pair combinations such as slow, using high precision non-contact displacement sensor position feedback signal, and construct a three dimensional mathematical model of mathematical mode of mathematical simulation calculation. The planetary gear and other transmission parts is simulated by KISSsoft. UG10.0 3D mathematical model was established for structure such as shell and gear cover, and advanced simulation ANALYSIS was carried out by using the "FEM and simulation" function module of UG10.0.Through dynamic calculation simulation and advanced simulation analysis, the results show that the design scheme of lightweight aviation drive mechanism can meet the requirements of lightweight, high torque/mass ratio and other relevant technical indicators. The design parameters and strength of the key transmission parts and structural parts of the driving mechanism meet the requirements, and the design scheme is reasonable and feasible.