Abstract: The increasing demand, the production reduction of remain oil, the lack of refining capacity and the bidding up by international idle money has caused international oil price stays high in the present. After synthetically analyzing the factors which cause crude oil price to move tempestuously in the international futures market, the paper presents idea that the WTI price will remain to move between 60 and 70 USD/bbl which is the temporary high level, it is hardly go beyond this scale greatly; as for the medium terms, the WTI price will wave gently around 40 USD/bbl, which is the acceptable level by suppliers and demanders.