Abstract: The utility model discloses a rotor steering magnetic force control device of a permanent magnet synchronous motor. Including a first base, wherein a second base and a third base are arranged outsidethe first base, a permanent magnet micro synchronous motor is arranged inside the first base, a first normally-closed microswitch is arranged inside the second base, and a second normally-closed microswitch is arranged inside the third base. The utility model discloses a permanent magnet synchronous motor rotor steering magnetic force control device. The power supply of the electromagnet is connected in parallel with the permanent magnet synchronous motor; the electromagnet drives the clamping jaw to decide the rotation direction of the rotor of the permanent magnet synchronous motor, the purpose of controlling the rotation direction of the rotor of the permanent magnet synchronous motor is achieved, the permanent magnet micro synchronous motor with rotor rotation magnetic force control isused for dragging the curtain, the curtain is covered and opened, and the purpose of a universal electric curtain is achieved.