Abstract: In order to study the suitable multi-objective optimization design method of components for composite structure,this paper takes the multi-objective optimization design of SRC columns as an example.According to the thoughts of engineering optimization and the theory of composite structure design,the minimum of the project cost and the maximum of the diagonal shear capacity are taken as the optimization objectives whose importance can be adjusted by weighting factors and the linear weighted method is used to establish evaluation function which changes multi-objective into single-objective in optimization.Taking the various constraints into consideration and choosing the sensitive design variables,the mathematical model of the multi-objective optimization design for SRC columns is provided.Based on the optimization thought of the complex method,the nonlinear optimization problems with constrained conditions are solved by MATLAB program.The practical example shows that the optimization method and thought presented in this paper are feasible and effective to SRC columns,which provides experinece for optimization design of members for composite structures and engineering reference and application.