Abstract: In order to discuss the artificial population reconstruction technology of Ammopiptanthus mongolicus in extreme arid area，the 45 days old container seedlings of Ammopiptanthus mongolicus were taken as test materials. Their transplant survival rates, later reservation rates and transplant seedlings growth under different site conditions, water conservation measures, transplanting times and irrigation frequencies were measured and analyzed by one way ANOVA. The results indicated that, in desert area where the years rainfall is about 110 mm (such as Minqin), site condition, planting time, water conservation measure and irrigation frequency had extremely significantly effect on their later reservation rates and growth amount of transplant seedlings (P<0.01). At same time, site condition and planting time also had very significantly influence on their transplant survival rates (P<0.01). During May early or September early, the artificial population reconstruction of Ammopiptanthus mongolicus had been planted in fixed sand dunes, sandy abandoned agricultural lands and mild salinization lands abandoned cultivation of extremely drought desert area, and their survival rates were over 90%. It was very important to take water conservation measures by covering plastic membrane immediately for transplanted container seedlings of Ammopiptanthus mongolicus and add one times irrigation for 45 days old transplanted seedlings that could effectively hold back its later death, promote their quickly growth. And next year September, the reservation rate of Ammopiptanthus mongolicus artificial population exceeded 93%, and the average height of transplanted seedlings attained to 10.00 cm and their crown were greater than 5.60 cm×6.10 cm.