Exchange rates and stock prices has been a hot issue in the financial sector research ,applying binary MS-VAR model contained RMB exchange rate and stock price, based on the monthly data between the July of 2005 to the December of 2014,examined the nonlinear relationship between RMB exchange rate and stock price in different regimes. The result shows there is a significant switching characteristic between RMB exchange rate and stock price and the dynamic relationship between them is not same under the different status. RMB appreciation will lead to the rise of stock price and the stock price also has a positive feedback to RMB exchange rate. However, the amplitude of response in regime 1 is significantly less than it in regime 2.