A horizontal LLS (lateral leg-spring) locomotion model of insect with damps was developed based on the work of John Schmitt and Philip Holmes, and the simulation was conducted in the MATLAB environment. The analysis of the locomotion gait of the model suggests that the model concerning damps is closer to the reality, and higher level of stability is attained. Thus the potential importance of control algorithm dominated by geometry and mechanical principle, which to some extent reduced the burden of nervous system of insects, was proposed. And the role the damps play in the stability was also discussed.