The present invention provides a multi-rotor permanent magnet synchronous motor, wherein the motor (100) includes a motor shaft (3) and the main mechanism (1) and the auxiliary mechanism (4) sleeved on the motor shaft (3) in turn which work in parallel; the auxiliary mechanism (4) includes a one-way bearing body (41) sleeved on the motor shaft (3) and auxiliary rotor components (40) sleeved on the one-way bearing body (41). The multi-rotor permanent magnet synchronous motor in the present invention does not need a gear box to drive, and the energy consumption is low. Besides, through the coordinative work of the main structure and the auxiliary mechanism, different torques can be output, so as to output different speeds.