Futures prices and spot prices change with each other. The existing theories, through mathematical regression analysis methods such as cointegration analysis, error correction model and causality test model, prove that futures prices and spot prices are two-way price-guided, futures prices will affect spot prices, and spot prices will also affect futures prices, which will tend to be consistent in the long run, and the two are mutually causal. Generally speaking, futures prices and spot prices will fluctuate with each other and eventually tend to be consistent. Generally speaking, futures are highly volatile. There is a slight error in this convergence. Futures prices and spot prices have their own cost differences, such as storage fees and management fees. On the maturity date, there will still be an error value, which adds up to form a premium between the futures price and the spot price. By the delivery date, this premium has reached the lowest level.