This study aims to measure the impact of investment on the stock market in China, based on the assumption that increased investment leads to higher stock market index, using annual data for the period 1993 to 2015, where two explanatory variables have also been added: the exchange rate and inflation. The descriptive method was used to present the concepts of variables, In addition to the statistical method which use the tests of stationary, normal distribution, multiple linear regression equation, which was estimated by the OLS method, and causal test, by using (Eviews8).