Abstract:The tailings filling is a complex industrial process, which has the characteristics of large time lag, nonlinear and time variability, the traditional control strategy is not effective and it is difficult to achieve accurate control of concentration, therefore, the advanced control algorithm is needed to control the filling concentration accurately and improve the stability of concentration control.The concentration control model is established based on the production process of a gold mineas as the research object, a fuzzy internal model control strategy is proposed, the PSO algorithm is used to identify the fuzzy adaptive parameters online,the concentration control system is simulated in MATLAB.Compared with IMC algorithm and fuzzy IMC algorithm, the optimized fuzzy internal model control algorithm has the advantages of small overshoot, high robustness, the concentration control has fast response speed and high stability, it is superior to IMC and Fuzzy-IMC algorithm in anti-interference and stability, the concentration control error is 2%, which is 3% higher than IMC algorithm, it can significantly improve the control precision of the system and better meet the requirements of practical applications.