The invention relates to a permanent magnet direct current motor, in particular to a multi-phase permanent magnet direct current motor. The problems that in an existing permanent magnet direct current motor, output torque is imbalanced, and harmonic wave heating is serious are solved. 12*n grooves are formed under each pair of poles of a stator of the multi-phase permanent magnet direct current motor, wherein n is equal to 1 / 2, 1, 2, 3..., six phases of windings with the same number of turns are symmetrically arranged under each pole pair of the stator, and the wire outlet ends of all phases of windings are connected; a power supply device enables direct current to pass through (1-4), (2-5), (3-6), (4-1), (5-2) and (6-3) in sequence to penetrate through the windings according to the rotor position and rotating speed, the motor stator windings will produce a clockwise rotation magnetic field in an air gap, and under the drive of the magnetic field, a rotor of the motor will also rotate clockwise. The motor can be widely used in the variable-speed variable-shaft-power nonconstant speed using environment such as an electromobile, an elevator, a belt conveyer and a ship, and can also be applied to large-power large-starting-torque speed adjusting equipment such as petroleum and spinning high-precision devices.