An electric motor is characterized by comprising: a stator assembly, comprising a housing and a winding; wherein the housing is provided with a receiving cavity, and the winding is accommodated in the receiving cavity; a rotor assembly, sleeved in the winding; wherein the rotor assembly comprises a magnetic ring, a magnetic knitting frame, an iron core, several tile-shaped magnets, a rotating shaft, aramid fiber, and a rotor end plate; the iron core is sleeved in the rotating shaft and is provided with a first installation slot, tile-shaped magnet is arranged in the first installation slot and a positioning slot is arranged between two adjacent tile-shaped magnets; the aramid fiber is wound around the outer surface of the tile-shaped magnet; the rotor end plate is sleeved on the rotating shaft, and is arranged on first end of the iron core; the magnetic knitting frame is sleeved on the rotating shaft, and is located on second end of the iron core; one end of the magnetic knitting frame is provided with a positioning boss which is inserted into the positioning slot; the magnetic ring is arranged on the other end of the magnetic knitting frame; the rotor end plate is provided with a first wire-embedding slot; the magnetic knitting frame is provided with a second wire-embedding slot, a wire outlet and a threaded hole; the wire outlet is arranged on the wall of the second wire-embedding slot; the first wire-embedding slot is used for accommodating initial sections of the aramid fiber, and the second wire-embedding slot is used for accommodating final sections of the aramid fiber; the final section of the aramid fiber goes through the wire outlet and is fixed to the threaded hole after being led out; the number of the threaded hole is at least one, and the threaded hole is arranged at the central portion of the magnetic knitting frame; a front end cover assembly, comprising a front end fastener and a front cover plate; wherein the front cover plate is arranged on the first end of the housing, and the front end fastener is used for fixing the front cover plate to the housing; a rear end cover assembly, comprising a rear end fastener, induction components and a rear cover plate; wherein the induction components are arranged on the rear cover plate, and are used for sensing the magnetic ring, and the rear end fastener is used for fixing the rear cover to the second end of the housing; a three-phase power line, electrically connected to the winding; a data transmission line, one end of which is electrically connected to induction components and the other end of which is electrically connected to an external electronic speed control device. a stator assembly, comprising a housing and a winding; wherein the housing is provided with a receiving cavity, and the winding is accommodated in the receiving cavity; a rotor assembly, sleeved in the winding; wherein the rotor assembly comprises a magnetic ring, a magnetic knitting frame, an iron core, several tile-shaped magnets, a rotating shaft, aramid fiber, and a rotor end plate; the iron core is sleeved in the rotating shaft and is provided with a first installation slot, tile-shaped magnet is arranged in the first installation slot and a positioning slot is arranged between two adjacent tile-shaped magnets; the aramid fiber is wound around the outer surface of the tile-shaped magnet; the rotor end plate is sleeved on the rotating shaft, and is arranged on first end of the iron core; the magnetic knitting frame is sleeved on the rotating shaft, and is located on second end of the iron core; one end of the magnetic knitting frame is provided with a positioning boss which is inserted into the positioning slot; the magnetic ring is arranged on the other end of the magnetic knitting frame; the rotor end plate is provided with a first wire-embedding slot; the magnetic knitting frame is provided with a second wire-embedding slot, a wire outlet and a threaded hole; the wire outlet is arranged on the wall of the second wire-embedding slot; the first wire-embedding slot is used for accommodating initial sections of the aramid fiber, and the second wire-embedding slot is used for accommodating final sections of the aramid fiber; the final section of the aramid fiber goes through the wire outlet and is fixed to the threaded hole after being led out; the number of the threaded hole is at least one, and the threaded hole is arranged at the central portion of the magnetic knitting frame; a front end cover assembly, comprising a front end fastener and a front cover plate; wherein the front cover plate is arranged on the first end of the housing, and the front end fastener is used for fixing the front cover plate to the housing; a rear end cover assembly, comprising a rear end fastener, induction components and a rear cover plate; wherein the induction components are arranged on the rear cover plate, and are used for sensing the magnetic ring, and the rear end fastener is used for fixing the rear cover to the second end of the housing; a three-phase power line, electrically connected to the winding; a data transmission line, one end of which is electrically connected to induction components and the other end of which is electrically connected to an external electronic speed control device.