Abstract: In the report, aimed at the problem of system stability caused by the existence of network delay, a new method of delay compensation and control was proposed for networked parallel cascade control systems based on new internal model control and Smith predictive control. The real network data transmission process replaced the network delay estimation compensation model, and by which the dynamic compensation and control of network delay can be realized when the predictive model of the plant was equal to the real model. The simulation results showed that the system has good tracking performance, strong robustness and anti-interference ability.