在选矿工程的各种控制中，有一类具有双线性特征，它难以用常规控制算法来控制，特别是线性控制算法。对不同控制系统的可行性进行了一系列的研究，模糊控制便是其中之一，它表现出足够的控制特性。然而，在模糊逻辑控制的设计中，为了优化比例因数，必须使用试错法。所以，作者采用基因算法（GA）成功地使优过程自动进行。 Among the various control of beneficiation project, one of them has bilinear characteristic, which is difficult to control by conventional control algorithm, especially linear control algorithm. A series of researches on the feasibility of different control systems are carried out. One of them is fuzzy control, which shows sufficient control characteristics. However, in the design of fuzzy logic control, trial and error methods must be used in order to optimize the scale factor. Therefore, the author successfully adopted the genetic algorithm (GA) to make the superior process automatically.