Soybean output and trade are mainly operated in America, Brazil, Argentina and China in recent years, especially in America. For China, the import output is number one, and the export output is the forth. For this reason, the soybean industry of China got a huge lash, and the soybean farmers got a large loss, it influenced the building of new countryside construction in China. Both U.S.A’s soybean output and trade amout are the number one in the world, this achievement should be contributed to U.S.A’s advanced production ability and its favorable subsidy policies. Contrary to U.S.A’s large subsidy and cheap loan, Brazil and Argentina raise their soybean output and trade amount by high production technology and “untying” policies, such as abolishing some unreasonable rules and tax. So if we want to develop Chinese soybean industry and make sure our soybean industry’s safety, it’s necessary for us to experience soybean industry development of other countries’ and improve ours. Soybean output and trade are mainly operated in America, Brazil, Argentina and China in recent years, especially in America. For China, the import output is number one, and the export output is the forth. For this reason, the soybean industry of China got a huge lash, and the soybean farmers got a large loss, it influenced the building of new countryside construction in China. Both USA’s soybean output and trade amout are the number one in the world, this achievement should be contributed to USA ’ s advanced production ability and its favorable subsidy policies. Contrary to USA’s large subsidy and cheap loan, Brazil and Argentina raise their soybean output and trade amount by high production technology and “untying” policies, such as abolishing some unreasonable rules and So if we want to develop Chinese soybean industry and make sure our soybean industry’s safety, it’s necessary for us to experience soybean industry development of other countries’ and improve ours.