This paper firstly introduces the principle and advantages and disadvantages of dynamic matrix control（ DMC）algorithm which includes model prediction

rolling optimization

error correction and closed- loop control

and applies DMC into the control of superheated steam temperature system through analyzing characteristics of the controlled object and establishing the corresponding transfer function model. Research suggests that DMC has strong robustness and anti-interference performance for the large inertia

long delay object compared with the traditional PID control.