Abstract: Spring design is made mostly with the basic formula method, which is unable to be used to appraise whether the design is optimal or not although the structural performance can be satisfied. The constraint stochastic method is used in this paper to make an optimal design of spring and give an optimal solution. The procedure of this method is first to define the type of spring and set up optimal model——objective function and constraint function——using basic formula, and then to make calculation with computer,and finally to get optimum design programme.

Key words: Spring, Optimal Design, Computer Application