The invention discloses a novel gear motor. A motor and a speed reducer are integrally designed, wherein the motor part selects a high-speed low-torque permanent magnet synchronous motor, and the speed reducer part consists of two stages of speed reduction units, and the speed reduction units are connected in series. The input end of the motor speed reducer is a permanent magnet synchronous motor,the output end of the motor speed reducer is the shaft end of the speed reducer, and the output shaft can be redesigned and adjusted according to requirements. The designed motor speed reducer is large in torque, low in rotating speed, good in stability and the like, achieves the purposes of increasing torque and reducing speed of the reducer well, and enlarges the application range of the motor.A speed reduction unit comprises a first-stage planet carrier integrated with the shaft, a center gear, a duplex inner gear ring integrated with a shell, and a second-stage planet carrier. The planetcarrier integrated with the shaft is used for replacing the key connection between a common shaft and the planet carrier, so that the number of parts is reduced, and the assembly time is shortened. Adrive gear adopts a coplanar double-internal-meshing planetary gear, and the basic components comprise a central gear, a coplanar gear ring, a duplex inner gear ring and a planet carrier, and all themeshing gears are in internal meshing, so that the weight, the size and the number of parts of a drive structure are reduced; the speed reduction units are connected in series and can be connected inseries in a multi-stage mode, a large transmission ratio is achieved within a limited size, and large torque is output.