Abstract: The recovery of artificial vegetation have been making progress with the establishment and development of desert science in the arid and semi-arid region.The research has made great contribution to national economy and the control of soil desertification.In recent years,considerable achivements have been made in several research fields such as the trees and shrub physiology of drought-resistance,selection of the drought-resistance estimating index,water consumption of transpiration,soil water activity,woodland water balance and the evolution and substitution of artificial vegetation,etc.The key research fields on the trees and shrubs drought-resistance and woodland water activity in the future are the physiology basis of trees and shrubs drought-resistance,the selective breeding of the improved varieties,the rehabiliatation ecology of the sandy vegetation,the systematization of the artificial woodland research,and the afforestation modelization,etc.

Key words: arid and semi-arid region, drought-resistance, water activity, afforestationL