Based on a 6-DOF flight simulator driven by electricity, the experiments show that certain parameters of the AC servo driver have a great impact on the stability of the platform. The study of the optimization for controlling parameters of the AC servo drivers is carried out by the continuous change to the controlling parameters, aiming to improve the performances of the platform in stabilization and frequency response by Particle Swarm Optimization. The result shows that the Particle Swarm optimization algorithm is fitted for the system of the controlling parameter optimization.