The invention discloses a disc-type dual-redundancy structure permanent magnet synchronous motor, which comprises a shell body, a motor shaft, a first end part rotor, a first stator, an intermediate rotor, a second stator and a second end part rotor, wherein the shell body comprises an upper end cover, a lower end cover, a first side end cover and a second side end cover; the first end part rotor and the second end part rotor are of the same structure, and each comprise an end part permanent magnet mounting frame, a plurality of end part permanent magnets and a magnetic yoke; the intermediate rotor comprises an intermediate permanent magnet mounting frame, a plurality of intermediate permanent magnets and an intermediate permanent magnet pressing plate; and the first stator and the second stator are of the same structure, and each comprise a stator disc, a coil winding and a plurality of stator disc pressing plates. The invention further discloses a control method of the disc-type dual-redundancy structure permanent magnet synchronous motor. The disc-type dual-redundancy structure permanent magnet synchronous motor is novel and reasonable in design and convenient in implementation, reduces iron loss, improves efficiency, is low in vibration noise, eliminates the cogging effect, is high in operating reliability, has wide application prospect, and has high popularization and application value.