The invention relates to a controller of diversion milking machine. Wherein, on the milking machine, four milk cups, four vacuum tubes, four transparent milk tubes, four synchronous control valves, four vacuum tubes, four transparent milk tubes, milk collector, vacuum tube, milk tube, impulse device, and milk barrel are connected; when milking, watching which transparent milk tube is not flow with milk, closing relative valve, to avoid milking over or milking too little. And it can directly mount four transparent two-beam synchronous control valves between four milk cups and milk collector, and the milk tube can be not transparent.