Abstract: Based on structural engineering optimization theory of composite structure，the minimum project cost and the maximum diagonal shear capacity were taken as the optimization objectives. According to the mechanical characteristics of the steel reinforced concrete，the concrete sectional sizes of the SRC member were optimized with application of optimality criteria K-T conditions under minor earthquakes，and the optimization of steel volume was implemented under moderate earthquake with application of hierarchy process genetic algorithm，thus，the analytic hierarchy process optimization criterion genetic algorithm ( OC-GA) was established. Considering the related design specifications and constraints，the SRC frame column was optimized by analytic hierarchy process OC-GA，and the optimization method and thought were proved by engineering example.