This topic examines one of the functions of futures speculation-promoting price discovery. The futures market collects almost all information about supply and demand. The purpose of speculators' trading is not to deliver goods in kind, but to gain profits by using price fluctuations, which requires speculators to collect and sort out information about price changes and analyze market conditions through various means. In the futures market, speculators' trading orders are concentrated in the open bidding of the exchange, and the price tends to be reasonable due to the interaction between buyers and sellers. The price discovery mechanism of futures market is embodied by the comprehensive prediction of future market price trends by all market participants. The exchange publishes market information to the whole world every day, so that those enterprises that are outside the futures market can make full use of futures prices as an important reference for formulating business strategies.