The invention provides a press-fitting device for bearing pieces. The device comprises a rack and a working platform arranged at the upper end of the rack; a bearing base conveying line for conveying and combining the bearing pieces is further fixed at the upper end of the working platform; and a press-fitting device I is further arranged on the back side of the bearing base conveying line. With the device, bearing parts are manually placed on a bearing base at the bearing base conveying line, a push cylinder works to control a push plate to push combined pieces rightwards, and when the combined pieces are pushed to the lower end of a press-fitting mechanism, the press-fitting mechanism detects the positions of the combined pieces and performs press-fitting work; if errors are made during detection, the press-fitting mechanism can be moved manually to be moved leftwards and rightwards until the press-fitting mechanism reaches the correct position, working can be conducted again, the device is provided with a deviation correction structure, and the press-fitting efficiency and the press-fitting precision are improved.