The relationship between physical objects and investment targets. Crude oil is one of the most important commodities in the world, and futures is one of the most important trading methods in the crude oil market. The two are inseparable, which is the relationship between the physical object and the investment target. The influence of crude oil on futures is a complex and diverse process, which is influenced by supply and demand, geographical factors, financial market fluctuations and seasonal factors. Crude oil is a dark brown viscous oily liquid with green fluorescence and special smell, which is a mixture of alkanes, cycloalkanes, aromatics and olefins. The main components are carbon and hydrogen, accounting for 83-87% and 1 1- 14% respectively. There are also a small amount of sulfur, oxygen, nitrogen and trace elements such as phosphorus, arsenic, potassium, sodium, calcium, magnesium, nickel, iron and vanadium.