Abstract: To promote the green development of industry and guide the design of green products for enterprises, a lightweight design was carried out on a ship's jig as the research object. Using UG for parameterized modeling of the jig, based on the Ansys simulation platform, static analysis of the jig was carried out. The center composite experimental design method was adopted, with the mass, total deformation, maximum equivalent stress, and safety factor of the jig as performance indicators, and two types of plate thickness dimensions on the jig as design variables. A second-order response surface model of the jig was constructed, and the genetic algorithm was used for multi-objective optimization of the jig to achieve lightweight design. The robustness of this method was verified. The lightweight design of the jig, as a green product design, can provide reference methods and a basis for shipbuilding enterprises in assisting fixture design.