Abstract: Compared with other arid areas of the world,the agricultural oases in Xinjiang possess the following characters：1.they are desert and irrigated, and water is the main factor for their subsistence and devel-oprnent,2.there are abundant light,heat and water resources and great potential for increasing their productivity,3.the eco environment is extremly susceptible to the damage of drought,cold,sand-wind and saline-alkalinity,4.inconvenient traffic and communication and closed economy are the hindering factors for their development,and 5.household economy is becoming an important part of oases eco－environment.Based on these characters,various approaches for their ecological construction are put for-ward in the paper.

Key words: Quercus acutissima, thinning, carbon density, biomass.