The utility model belongs to the field of screen production. The reinforcing mesh plate machining device comprises a base, the equipment comprises a pay-off device, a straightening and rolling device,a screen plate welding device and a shearing device, wherein the straightening and rolling device comprises a first underframe, a longitudinal bar monitoring device, a coarse straightening device, aprimary rolling device, a storage device and a stepping rolling device, the longitudinal bar monitoring device comprises a supporting table, a fixing shaft and a shaft cap, the coarse straightening device comprises a first straightening table and a plurality of straightening plate fixing seats, and the primary rolling device comprises a rolling table and a pressing roller; the storage device comprises a storage frame, a supporting rod and a sensing device. The stepping rolling device comprises a second straightening table, a stepping device and a straightening plate fixing table, the screen plate welding device comprises a second bottom frame, a welding table and a welding head arranged on the welding table, the shearing device comprises a third bottom frame and a tool rest, and a tool isarranged in the tool rest. Steel bars can be machined into the net plate, the machining process is automatic, manpower and material resources are saved, the production efficiency is high, and the machining process is safe.