The invention discloses an electromagnetic braking three-phase asynchronous motor including a lubricating oil shell. A threaded block is fixedly connected to the surface of the lubricating oil shell,a threaded groove is formed in the threaded block, a sliding plate is slidably connected to the surface of the inner wall of the lubricating oil shell, the top of the sliding plate is fixedly connected with a connecting block, the top of the connecting block is fixedly connected with an extending plate, one end of the extending plate penetrates through the lubricating oil shell and the threaded groove in sequence and extends to the outside of the threaded groove, and a clamping box is arranged on the surface of the extending plate in a sleeved mode. The invention relates to the technical fieldof motors. The electromagnetic braking three-phase asynchronous motor solves the problem that the adding amount of the lubricating oil is inconvenient to regulate and control when the lubricating oilis added into a machine, the threaded groove and the threaded block enable the extending plate to slide evenly and annularly, so that the operation of a user is facilitated; and due to the arrangement of the clamping groove and the arc-shaped fixing block, the amount of extruded lubricating oil is always fixed, and the users' use is facilitated.