1, the relationship between supply and demand, the relationship between supply and demand is the main reason for the rise in oil prices. When global crude oil production can't keep up with demand, that is, when supply exceeds demand, oil prices will rise.

2. US dollar index. The dollar index is inversely proportional to the oil price, that is, when the dollar index weakens, funds will flow from the dollar market into the crude oil market, thus stimulating the rise of crude oil and driving the oil price to rise.

3. Economic development. When the economy recovers or develops rapidly, it will increase the consumption and demand of crude oil and stimulate the rise of oil prices.

4. The influence of war. When a war breaks out, it will increase the demand for crude oil and affect the output of crude oil. Hedge funds will flow into the crude oil market, leading to an increase in oil prices.

5. Policy impact, major crude oil producing areas, and the introduction of relevant policies to reduce or restrict crude oil exports will all lead to an increase in oil prices to a certain extent.