Fixing block for machining hollow-out structural part of motor

The utility model relates to the technical field of motor processing auxiliary devices, and discloses a motor hollowed-out structural member processing fixing block which is a movable solid core block attached to the interior of a hollowed-out structural member and used for supporting the interior of the hollowed-out structural member. The solid core block is of a cuboid structure; a first guide groove and two side edge guide grooves symmetrically distributed in the two sides of the first guide groove are formed in the middle of the upper end face of the solid block, and therefore four protrusions used for supporting are formed. Two lower end guide grooves are symmetrically formed in the lower end surface of the solid core block; the first guide groove, the side edge guide groove and the lower end guide groove are parallel to the short edges of the upper end face and the lower end face of the solid core block respectively, extend towards the two ends of the solid core block and are arranged in a penetrating m