As an influential important part of China's economics, export trade develop rapidly in recent years. Exchange rate becomes the focus as an important factor of development of a country's trade. However, the relationship between exchange rate and exports has not been determined. The results of the regression obtain, the change of the exchange rate of RMB against the U.S.A, Hong Kong, the United Kingdom to their exports have a significant impact, however, the exchange rate for Germany and Japan have no significant impact on their exports. Thereby objectively supported the Government maintained the RMB exchange rate stability, reducing exchange rate risk decisions.