The invention discloses a spiral linear motor. A stator core is made into a single-turn or multi-turn spiral iron core with an equal screw pitch, and the moving pitch of a mover depends on the spiralspacing of the stator spiral iron core. The spiral iron core is divided into two types including an inner notch type and an outer notch type. A three-phase winding is embedded in the notch of the spiral iron core. The mover for outputting electromagnetic force is a cylindrical metal electric conductor, and the mover is sleeved in the stator and can rotate and slide. When the stator is connected tothree-phase alternating current, a spiral magnetic field which is consistent with a spiral angle of the spiral iron core is generated in the spiral iron core, the surface of the mover corresponding to the spiral magnetic field induces a spiral eddy current magnetic field whose direction is consistent with a spiral magnetic field direction, and the spiral eddy current magnetic field of the mover and the spiral magnetic field of the stator interact to allow the mover to do helical motion with the equal screw pitch in a speed lower than the rotation speed of the stator spiral magnetic field. Thespiral linear motor is used as an induction motor capable of outputting torque and outputting axial force and is suitable for an occasion with the need of long-distance linear propulsion.