Soybean meal is a high?quality feedstuff of livestock and poultry. In recent years, the contradiction between supply and demand of soybean meal becomes prominent, which is not good for the sustainable devel?opment of feed industry. This paper reviewed the home and abroad research about the reduction of soybean meal to provide a reference of the use of nutrition regulation technology for the reduction of soybean meal in the diet of livestock and poultry.[ ...