Abstract: At present, the cultivation of tungoil tree (Aleurites fordii Hemsl) in hills is a main tendency of development of its production. The effects of different elevation on the growth and bearing of tungoil trees have been determined for five years from 1982 to 1986 in Longju township, Wanxian county, Sichuan Province. The research on variability of sprouting stage, bud appearing stage and flowering stage has been done at different elevations. The relationship between the conditions of soil fertility, different elevation, and yield of tungoil tree, component factors of the yield and tungoil quality has been analysed. The results show that the elevation is negatively related to seed percentage, oil content and the content of tungic acid obviously. It posed that 700 m is the suitable limit and cultivation may be up to 800 m at most in the Sichuan Province.