Abstract: As global peak oil gradually will be approaching,low-cost oil supply available for China would be reducing,increasing the degree of oil external dependence,It is really vital to ensure China oil supply security.Based on literatures research and data analysis,from the oil supply perspective,the paper provide to protect native scarce oil resources,limit the production growth of traditional giant and medium oil fields,and increase the investment in offshore oil and South America district.As to alternative energy,the paper suggest to develop pithead power plant and clean energy strategies.