The subsidies provided by the US government for soybean production can be mainly divided into two categories: one is direct subsidies, which are directly provided to soybean producers, mainly including marketing loan subsidies, loan spread subsidies, direct subsidies and countercyclical subsidies. The other is the general service support provided by the government, including support for soybean research, technology popularization, pest control, inspection, infrastructure construction and environmental protection. Because the latter has less distorting effect on the market, direct subsidies are mainly used.