Manual chamfering machine

The manual chamfering machine comprises a guide sleeve, a square slide way is arranged in the guide sleeve, a first guide groove is formed in one side of the square slide way and is arranged in the direction parallel to the central axis of the square slide way, and the orientation of the first guide slide way is perpendicular to the central axis of the square slide way; the central plane between the two side surfaces of the first guide groove passes through the central axis of the square slide way; a first sliding plate is arranged in the first guide groove and is in sliding connection with the first guide groove, and the relative sliding direction of the first sliding plate and the first guide groove is perpendicular to the central axis of the square slide way; the face, close to the central axis of the square slideway, of the first sliding plate is fixedly connected with a first grinding piece. A first spring is arranged in the first guide groove and located on the side, away from the central axis of the sq