The resource reserves and prices have great impact on the stock price of resource-based listed companies. After the financial crisis, Chinese enterprises have more advantages and impulses to purchase resources aboard because of the low cost of Chinese capital market. This paper focused on the empirical research of Yunnan Tin Company Limited and established a multi linear logarithmic model with company data from July 2000 to May 2008. It measured the sensitivity of resource reserves and prices on the stock price of the corresponding companies, and analyzed the mechanism of affect.