Taking the box-type heating furnace as the research object, aiming at the lag and time-varying defects of PID control in temperature control, a new fuzzy PID control scheme with Smith compensation link is proposed, and the simulation is realized using MATLAB. It can be seen from the simulation results that, compared with Smith control and fuzzy control, the improved system has higher accuracy, enhanced anti-interference and robustness, more stable system transition process, and ideal overall control effect, which has good promotion value.