The invention discloses an unmanned aerial vehicle charging system. The system involves an unmanned aerial vehicle, a movable trolley, an auxiliary base station and a parking apron; the unmanned aerial vehicle is provided with a charging connector; the movable trolley comprises a trolley main body, a camera module, a GPS module, a trolley communication module, a main controller, a manipulator anda vertical lifting mechanism, wherein the vertical lifting mechanism is arranged at the front end of the advancing direction of the trolley main body in an erected mode, the manipulator is slidably fixed with the vertical lifting mechanism through a fixing part, the camera module is arranged at the top of the vertical lifting mechanism, the GPS module, the trolley communication module and the maincontroller are all arranged on the trolley main body, and the main controller is connected with the camera module, the GPS module and the trolley communication module correspondingly; and the auxiliary base station is provided with a base station communication module. The unmanned aerial vehicle charging system has the advantages of being simple and rapid in process, high in efficiency, high in stability, capable of saving manpower resources and the like.