In order to improve vehicle ride comfort and to reduce tyre dynamic load to ground, vehicle model was established for the study of multiple objectives with a truck. The unified objective function method was used for the optimization of vehicle suspension parameters. 为了改善汽车行驶的舒适性并减小轮胎对路面的动载,以某载货汽车为研究对象,建立了多目标优化模型,并采用统一目标函数法对车辆悬架参数进行优化。