Abstract: Grinding-classification operation is one of the most important link of production technology process for mineral processing plant.Realization of automatic control is crucial for energy saving，consumption reducing and benefit increasing.Control strategy of grinding-classification is the core of automatic control system.It is gradually developed from traditional control strategy to modern control strategy and intelligent control strategy.It is more and more suitable for grinding-classification control which has the characteristics of multivariate，nonlinear，large lag，time-varying.Its development tendency will be the compound control strategy combined by several intelligent control method or mechanism.

Key words: Grinding-classification, Control strategy, Traditional control, Modern control, Intelligent control