From the angle of the microcosmic structure of the securities market , using alterable dynamic model of the bargainer colony , separately under ascertained and incertitude finance circumstance , we have studied the form process of the market under disperse bargaining estate and we have analysis chaos conditions of bargainer colony of alteration. Result indicates that lowest standard of market liquidity is that bargainer colony of buyer and seller both must have an appropriate proportion. The time achieving stable liquidity of the market has relation to parameter for bargainer to leave the stock market . Through influence of bargaining system on parameter of bargainer colony , the control of market process can be realized. Finally simulation calculation is given.