| The field experiment has been carried on for studying the source, distribution in profiles, crop utilization of soil water of dry land in shallow maintain area in Qinghai Province. The results showed that soil water originated essentially from precipitation in this area, that soil can not keep water effectively, and the content of water of 2040 cm is the highest at range of 0100 cm in profile. Meanwhile, the staple crop's coefficient of water consuming in this area, wheat is 898.5, potato is 760.5, and bean and flax are high than 2140. |