An automatic unloading device for docking drones is designed based on an intelligent logistics system for drones. Compared to the large assembly lines and complex robotic unloading devices under existing technology, the mechanism is characterised by a simple structure, easy disassembly and reliable operation. According to the work requirements of the force analysis of the mechanism, ADAMS to establish automatic unloading device virtual prototype model and its dynamics and kinematics simulation, to derive the trajectory of the cabin components and movement parameters, according to the characteristics of its movement to its design, to provide a basis for its final design, laying the theoretical foundation for the automated design of the UAV intelligent logistics system.