Abstract: In view of problems of nonlinearity, large inertia, hysteresis and time variation of tensioning system of belt conveyor, a mathematical model of tension device was established, and it was proposed to connect a correction links in series to eliminate system shocks; it was proposed to combine dynamic matrixcontrol with PID control to design tension control system for tension device of belt conveyor, making good use of advantages of strong anti-jamming ability of PID control and good adaptability to inertia and retardation of dynamic matrix. AMESim/Simulink was used to model mechanical hydraulic and control algorithm of belt conveyor. The simulation analysis results show that under serial control of dynamic matrix and PID, the tension control system of the tension device of belt conveyor is robust to time-delay and variable-structure, has low peak tension, and can precisely track tension settings.