When investing in Hungary mining, investors are required to use the local currency Forint as the settlement tool, which, however, is unstable in remain the values, leading to big risk for China’s enterprise when investing in Hungary mining. This paper, based on the exchange ratio risks, applies the basic factor to analyze the exchange ratio risks of Forint, implies a big risk in a future time. Combined with a case of project investment, this paper presents some approaches to the exchange ratio risks of Forint, aiming at provide some reference for China’s investors when mining in Hungary.