The invention relates to an expansion bolt and a mounting and removing method of the expansion bolt. According to the expansion bolt, a mounting and removing nut and a sleeve are connected in a movable joint mode so that the mounting and removing nut can drive the sleeve and a screw to conduct axial relative movement in the screwing-in and screwing-out process. Due to steel rings and rib plates arranged at the tail end of the screw, the sleeve and the screw cannot conduct relative rotation. The mounting and removing method comprises the steps that the position of the sleeve is fixed through a sleeve nut, then the mounting and removing nut is screwed in and out, and therefore the sleeve can tilt or reset along notches under the action of an expansion head and the steel rings, and then mounting or removal of the bolt is achieved. The problem that in the mounting process of an existing expansion bolt, a nut and a screw are prone to rotating together and are difficult to screw in is solved, and the purpose that the expansion bolt is easy to remove is achieved.