This paper takes the vibration displacement control system of continuous casting mold driven by servo motor as the study object, aiming at the problem of the servo motor requirements of single direction and variable angular speed rotation in system processing control and considering that the selection of the system controller parameters mainly depends on experience, a compound tracking control strategy based on feedforward control and PID feedback control with parameter optimization is proposed. Firstly, an approximate mathematical model between the output speed of servo motor and vibration displacement is established according to the characteristics of the vibration displacement system of continuous casting mold driven by servo motor. Secondly, aiming at the processing constraints of servo motor single direction rotation, it is determined that the vibration displacement system of continuous casting mold takes speed compensation as the feedforward controller to ensure that the output of the system controller is greater than zero. Thirdly, aiming at the problem that the controller parameters of vibration displacement system are selected mainly depending on experience, a strategy adopting ameliorated moth-flame optimization (AMFO) algorithm to optimize the PID controller parameters is proposed, which can achieve high accuracy tracking control of the mold vibration displacement. Finally, simulation and experiment verify the effectiveness of the proposed control strategy, and the experiment results show that the adjustment time of the vibration displacement is shortened by 0. 3 s and the relative error of vibration displacement tracking is reduced by 1. 8% after optimization.