Abstract: Equipment operation can be real- time monitored by a system with OPC on the Wincc platform. This integrated system consists of different device or subsystem that use different controllers in coal preparation plant. In Dongfeng coal preparation plant of Xing county of Shanxi province,all that is needed to program a Wincc,so that real- time central control system monitoring is achieved,such as start-up and shut- down system,density control system,automatic flotation reagent adding system and so on.It is easy to manage coal preparation plant and expand system as well as can reduce cost and workload.