Abstract:Crotalaria usaramoensis as original distributed in south America,It is a legume perenial green manure crop. The result of experiment of Crotalaria usaramoensis shows that it possesses following suited characteristics.It grows rapidly. One year‘s growth rates of as much as 2.5 to 2.8 metres in height and 4000 to 5000 kg in green weight per mu have been demonstrated under tropical condition of southern Yunnan.It can survive and thrive in unfavorable or extreme condition, such as on poor, shallow or acidic soils, where grain crops could not grow.