The invention relates to a crude oil preheating temperature control method in the process of catalytic cracking, specifically comprising the following steps: first, building an extended state space model of crude oil preheating in the process of catalytic cracking through combination of a state variable, output tracking error and a set value variable to better deal with overshoot and oscillation caused by possible unknown disturbance during crude oil preheating; then, using an improved MOEA/D-DE algorithm to optimize a weighted matrix in an objective function; and finally, designing a PI-PD (PFC-PIPD) controller with predictive function control performance. The method improves the precision and speed of temperature tracking, and has good control performance.