The invention provides motor stator punches. The stator punches are stacked together to form a stator core, and each two optional stator punches which are adjacent to each other in the up-down direction serve as mirror images of each other. Screw holes in the stator punches are overlapped to form a screw hole of the stator core. Pin holes of the stator punches are overlapped to form a pin hole of the stator core. When two motor end caps are assembled at two ends of the stator core, four screw holes and four pin holes are respectively formed in four corners of each motor end cap. After being inserted in the pin holes, the positioning pins penetrate in the pin hole of the stator core. After penetrating in the screw hole of one of the motor end cap, a screw which is used for fixing the end caps and the stator core penetrates in the screw hole of the stator core, penetrates in the screw hole of the other motor end cap, and then is screwed with a nut.