An optimized design has been proposed for the auto-lifting system of walking aids, with its comfortableness and operating efficiency the optimization objectives. An introduction has been made of the working principle and structure of the auto-lifting system of walking aids, followed by an analysis of the mathematical model of its main components. And then an optimized modeling, based on the variation method, has been proposed for the auto-lifting system of walking aids, with a simulation model based on MATLAB thus established for the system. The simulation result shows that the optimized model is effective for practical applications.