Abstract: With the rapid development of animal husbandry，pigs，poultry and aquatic feed production in year-on-year growth，resulting in a shortage of feed raw materials，in addition to shortage of protein feed，energy feed are more and more serious.Resources to develop low-cost alternative to some of the feed corn and soybean protein，such as energy and raw materials is imperative. Leucaena and Cassava for their own advantage applications are great potential in the feed，accordingly，this article introduced its practical results and their potential applications.To study the use of high yield of China’s thermal areas，nutrient-rich Leucaena and Cassava to provide a reference，as a replacement part is expected corn and soybean protein，such as the importance of energy and raw materials.

Key words: Leucaena leucocephala; Cassava; feedingstuff