The invention discloses a permanent magnet square wave motor direct-driving intelligent speed regulation stirring reactor transmission device and relates to a transmission device. The transmission device comprises a six-phase permanent magnet square wave motor, a controller, a coupling and a connecting flange, wherein the permanent magnet square wave motor comprises a motor shaft, a rotor component, a stator component, a rear end cover, a front end cover, a position sensor and a shell; stator windings of the permanent magnet square wave motor are three-phase or multiphase windings, e.g., six-phase windings, and the two groups of three-phase windings U, V, W and R, S, T are independent, and the corresponding windings are in the spatial difference of 30E; and the six-phase windings of the permanent magnet square wave motor are connected in a star shape, and rotor steel magnets are bonded in a surface-mounted mode. According to the permanent magnet square wave motor direct-drivingintelligent speed regulation stirring reactor transmission device, a reducer on a traditional stirring device is omitted, and the technological requirements for low speed and large torque of a stirring reactor are met; and especially in the pharmaceutical and food industries, the phenomenon of oil leakage can be thoroughly eradicated, so that repair and maintenance are reduced, and efficiency isimproved.