Abstract: Based on a review of the development of maize subsidy policy in the United States (US), the European Union (EU), Brazil and China, the policy evaluation system of Organization for Economic Co-operation and Development (OECD) was used to compare and analyze the support level and structural changes of maize subsidy policies in the above countries and region from 1995 to 2018. In terms of support level of maize subsidy policy, the EU has the lowest level, and is followed by Brazil and the US. While China's policy support level for maize is relatively high. China should coordinate subsidy funds, appropriately adjust the amount of subsidies for maize, and actively guide farmers to gradually adjust the planting structure. In terms of support structure for maize subsidy policy, the policy support in the US and EU for maize is mainly payments based on current area (PC), and it is mainly market price support (MPS) in Brazil. As affected by border trade protection measures, such as maize tariff quota management, policy support for maize in China is still dominated by MPS, which has caused some distortions in the market. China should continue to push forward the reform of the maize storage system to make the maize price formed by the market, and gradually increase the international competitiveness of China's maize.

Key words: maize subsidy policy, support level, support structure