Abstract: The paper took control of an important technological parameter namely hydrocyclone feeding concertration of grinding process basic circuit as study object, introduced fuzzy control according to bad parameter adaptivity of model-free adaptive control (MFAC), and proposed a fuzzy MFAC method. It gave theoretical derivation process of the method and designed a fuzzy MFAC controller. Compared with basic MFAC method and PID method, the simulation experimental results show that the fuzzy MFAC method can quickly track expected value with smaller overshoot and tracking error and has strong anti-interference performance.