Abstract: In this paper, based on the mechanism analysis, mechanical analysis, it's obtained the influence law of Angle steel barrel for sonar under the given chain model and the chain length and the quality of heavy ball, the Marine environment (such as wind and current) system parameters. On the analysis of stress from the parts of nodes, static equilibrium equation is established. Then the optimization model is obtained by the optimization goal of the difference between the theoretical water depth and the actual water depth, and the constraint of static equilibrium equation. As the goals of the heavy ball quality, the buoy draught, swimming area radius and steel bucket angle, the multi-objective optimization model is set up by the constraint conditions of the angle of the chain, the angle between anchor chain and the seabed, and the statics balance equation though adjusting the heavy ball. Given the actual environment parameters, calculation and design of the mooring system is finished.