Over time China's economy has improved continuously, all product quality requirements more stringent, in this case there is quantitative feeder, adding it into production, so that product quality can be guaranteed, and saving time and labor, so the quantitative feeder control of many industrial producers is a topic of concern.The main topics for the alumina production process of raw materials in the portion of the application of quantitative feeder, the use of DCS control system for its various valves, instrumentation and control. This paper of the machine MACS system, through on-site instrument collected during the production of the signal I/O module main control unit to the server operator station, engineer station, a signal acquisition and processing, valves and instrumentation on the upper and lower limits, but beyond the range will alarm, then in order to solve the problem of detection processing.This design in industrial production will bring to generator maximum benefit, so that the cost is quite high, a lot of industrial production is essential.