The relationship between supply and demand in the world gold market determines the long-term trend of gold futures trading prices. Because gold has both commodity, monetary and financial attributes, and it is also a symbol of assets, the price of gold is not only affected by the relationship between supply and demand of commodities, but also very sensitive to economic and political changes. The oil crisis and financial crisis will lead to a sharp rise and fall in the price of gold. In addition, investment demand also has a significant impact on the change of gold price.