The new planetary trolley is a lifting machine that compactly integrates the motor, reducer, drum, etc., and can be used alone, or as a lifting trolley for double girder cranes, Gantry crane, etc. After optimizing the design of the crane ANSYS software, advanced technology and green design concept are adopted, greatly reducing the self weight of the small car and reducing the energy consumption of the entire machine. Modular design with strong combination greatly reduces the maintenance cost of the crane.