Abstract: This paper studies computational stock market by using network model and similar methodology used in solid mechanics.Four simultaneous basic equations, i.e., equation of interest rate and amount of circulating fond, equations of purchasing and selling of share, equation of changing rate of share price, and equation of interest rate, share price and its changing rate, have been established.Discussions mainly on the solution and its simple applications of the equation of interest rate and amount of circulating fond are given.The discussions also involve the proof of tending to the equilibrium state of network of stock market based on the time discrete form of the equation by using Banach theorem of contraction mapping, and the influence of amount of circulating fond with exponential attenuation due to the decreasing of banking interest rate.Keyworks:stock market; network model; differential equation; contraction mapping; elasticity; methodology

Key words: stock market, network model, differential equation, contraction mapping, elasticity, methodology