The financial attribute of commodities focuses on the acquisition cost, and the market purchase price is often the strong support line of the price, while the price change of oil futures focuses on the cost of holding positions. Theoretically, the futures price includes the seller's storage costs and should be slightly higher than the spot price. When the futures price is lower than the spot price for a long time, the spot market price will fall in the future. 2 1 century, oil, as the most important energy commodity in the global economy, has become more and more detached from the natural use attribute of things and injected more financial asset attributes of traded goods. In recent years, the fluctuation of international crude oil price is driven by profit-seeking capital, innovative financial instruments and international political contest based on supply and demand.