With the 41 samples of the second Shareholder Structure Reform companies,this paper analyzes the stock market abnormal fluctuation in a given event window,and tries to find out the reasons which result in it,and whether the companies'consideration scheme matters.The result of empirical research proves that the execution of Shareholder Structure Reform has apositive effect on the stock market.What's more,the stock consideration ratio and cash consideration ratio have a significant effect on the companies' stock,which is going up along with the increase of the ratios,but the additional promise is not so significant.