The invention discloses a method for optimizing and designing an automobile hub. The method comprises the steps of designing the style for an automobile hub body, carrying out mesh generation on a hub geometric model, establishing a finite element model, processing a load and boundary conditions of the hub, analyzing the automobile hub structural performance and optimizing and designing the hub structure. According to the method, the statics, dynamics analog simulation analysis and fatigue life prediction are carried out on the hub based on the finite element analysis, the hub structure is reasonably arranged, and the potential problem is found out as soon as possible and is modified pertinently. The using quantity of aluminum alloy materials is reduced on the premise that enough strength is guaranteed, the materials at the positions with the excessive strength are fully utilized, the product structure is more optimal and reasonable, the weight is reduced, the product quality is improved, the research, development and design period is shortened, production cost is reduced, and the enterprise market competitiveness is enhanced.