Abstract: A lot of surface water will be consumed in the course of drilling when adopting traditional drilling technology,and the trouble of lacking in water often occurs when drilling in droughty and water lack area.To solve this problem a pulsing device instead of traditional water valve of surface pump is developed in order to make local circulation of formation's water in bore hole.The water in surface pump running through pulsing device forms a hydraulic pulse to drive the submersible pump in down hole to work,realizing normal drilling using local circulation of formation's water in bore hole.This measurements can save 4/5~19/20 water.When the submersible pump is reformed to hydraulic impact device or reformed to down-hole watering pump,or reformed to hammer sampling machine it is possible to realize down-hole rotary percussion boring,to extract the ground water to meet the need of muddy water supply in droughty and water lack area,to take the sample without disturbing situation.When drilling with the new water-saving technology,the surface water almost will not be consumed,the strata not be disturbed and the drill penetration rate can be enhanced greatly,showing a nice future applied in droughty and water lack area.