The invention discloses an upper side bearing machining device with the adjustable angle. The upper side bearing machining device comprises a bottom plate provided with two rotation shaft bases. Eachrotation shaft base is provided with a rotation shaft. A right-angled plate is fixed through the two rotation shafts and is composed of a vertical plate and a transverse plate. Two T-shaped grooves are formed in the bottom plate side by side. A positioning movable block is arranged in each T-shaped groove. The upper end of the positioning movable block located on the left side is connected with aleft multi-angle positioning block, and the upper end of the positioning movable block located on the right side is connected with a right multi-angle positioning block. Each of the left multi-angle positioning block and the right multi-angle positioning block is provided with a stepped bevel. A supporting device is arranged at the front end of the transverse plate. Through the arrangement of theright-angled plate, the supporting device, the left multi-angle positioning block and the right multi-angle positioning block, upper side bearing bevels of different angles can be machined on the machining device, the tool manufacturing cost is saved, and the product quality and production efficiency are guaranteed. In addition, during upper side bearing machining, device positioning is stable, the situation of workpiece deflection cannot happen, and the machining precision can be better guaranteed.