Abstract: With the flat planting as comparison, the experiment was studied root field water consumption and water requirement characteristics of grape in the deep trench planting under drought stress in the northwest sandy area. The results were as follows： in the deep trench planting, they were lower than flat planting in the root field soil moisture evaporation of grape and daily evapotranspiration, meanwhile soil relative water content was higher than flat planting after watering; the deep groove planting saved more water than fiat planting in annual water consumption and annual watering aquirement. The above results showed that the deep trench planting pattern was beneficial to hold water and had obviously water-saving effect for the flat planting, realizing water-saving irrigation.