Traditional marble blade polishing machine adopts manual control mode, and can only polish one blade, so it has low efficiency. Aimed at the above problems, on the basis of the double blades polishing machine, the design scheme of the control system of double blades polishing machine based on KingView and S7-200 PLC was proposed, and the development of PLC control system and KingView monitoring system were completed. Through the control system, the automatic running of double blades polishing machine could be realized, and the running parameters of the machine in real time could be monitored because of PPI communication mode was adopted between PC and PLC. The operation of the system was simple and flexible, and it was easy to maintain. The actual production proves that the machine runs well, and the production efficiency is increased by 55% compared with manual polishing.