The utility model provides a bearing removal device, and particularly relates to a removal device used for bearings of the NU series, namely cylindrical roller bearings without blocking edges on inner rings. The device mainly solves the problems that bearings are taken out by means of inertia generated when an end cap is knocked, the end cap is prone to deforming and is damaged and scrapped, and efficiency is low. One end of a screw is connected with a support, the other end of the screw is provided with a tray, the tray is connected with the screw through a tray nut, and the curve shape of the outer circle of the tray and the curve shape of the inner ring of the radial section of a bearing to be removed are matched. The screw drives the tray, the tray moves to the bottom of a roller of the bearing to be removed and drags the roller of the bearing to be removed, the support serves as an external support, the screw is screwed through a wrench or a pneumatic tool so that the tray nut can drive the tray to ascend, and the bearing to be removed in a bearing end cap is pulled out. The tray can be detached and replaced according to bearings of different types.