The invention discloses a brushless motor, wherein multiple windings are windings formed by using the combination of a triangular circuit connection method and a star-shaped circuit connection method;an arc of which the cross section is slightly D-shaped and arc sections on both two sides are the section of a logarithmic line so as to be fit with each opening is arranged on the corresponding opening in each open slot of the stator of the brushless motor, the straight plane of the D shape faces the winding and is with the back to each open slot of the stator, magnetic strips having the slope of 7-9 degrees with respect to the parallel direction of the axis of the stator of the brushless motor are arranged on the straight planes of the D shapes, and magnetic strips having the slope of 2-6 degrees with respect to the parallel direction of the axis of the stator of the brushless motor is arranged on the surfaces, close to the rotor of the brushless motor, of rectangular open slot sealingstrips arranged on the arc-shaped surfaces on two sides of the D shapes; multiple rotor permanent magnetic sheets arranged on the rotor of the brushless motor have included angles of 68-88 degrees with the radial direction of the rotor of the brushless motor.