The invention relates to a gearbox motor integral rotating device for an electric motor tricycle, and a driving method thereof, and the invention is designed for solving the technical problem of poor gearbox motor integral rotating device and driving method of the traditional electric motorcycle tricycle. In the rotating device, a differential gear casing of a rear bridge assembly and a motor arehorizontally and transversally arranged on the same plane of the bottom of the vehicle body. An active helical bevel gear bearing seat is vertically and longitudinally connected with a motor and the differential gear casing. The horizontal rotating force of the motor is transmitted to the active helical bevel gear bearing seat trough a planetary transmission seat, and is converted into a verticalrotating force by the active helical bevel gear bearing seat, and the vertical rotating force is transmitted to the differential gear casing. The invention has the advantages of stable gravity centerof the vehicle body, stable driving, high safety coefficient and feasible driving method, and is suitable for the same type of electric motor tricycles and the structural improvement of the gearbox motors of the similar electric motor tricycles.