Abstract: In order to explore influence of large-scale exploitation of underground water on underground water level in large scale modern high standard farmland in Mu Us desert，the Chang Han Oboo Village land development project in Yuyang district was selected as research object，8 wells in the project area were selected for monitoring groundwater level for one year.Results showed that： depth of groundwater decreased at beginning of irrigation period，water level gradually rised to nomal level at end of irrigation period.Therefore，using of modern sprinkler irrigation facilities for farmland groundwater exploitation had not substantial impaction on groundwater level in the project area.