Machining plane of circular workpiece

The utility model relates to the technical field of machining planes, and discloses a machining plane of a circular workpiece, which comprises a machining plane body, a plurality of sewage discharge holes are arranged on the machining plane body, a plurality of connecting holes are arranged on the upper surface of the machining plane body, a fixing block is arranged on the upper surface of the machining plane body, and a plurality of positioning holes are arranged on the fixing block. A positioning hole is formed in the fixing block, and the fixing block is in threaded connection with the machining plane body in the mode that a fastener sequentially penetrates through the positioning hole and the connecting hole. According to the round workpiece clamping device, the multiple dirt discharging holes, the multiple connecting holes, the positioning holes, the clamping blocks, the locking nuts, the first screw rods, the locking screw rods and the fasteners are arranged and matched with one another, so that multipl