Abstract: On the basis of the basic principles of ecology,the shrub vegetation in the Hexi Corridor was classified into eight types,of which distribution,ecological characters,ecological significance and relations with soil were studied,with emphasis on their roles in improving the eco environment of the Hexi Corridor,in breaking winds,fixing sands,establishing desert grasslands and controlling desertification in the arid desert system.On such a basis constructive strategies are put forward for rebuilding ecology in desert system and sustainable development of the Hexi Corridor.

Key words: the Hexi Corridor, shrub vegetation, ecology