The population in Qinghai province is relatively concentrated,but water resource is poor.It could overcome the irrigation difficulty of water deficiency throughout history to popularize the technique of rainwater accumulation and utilization.Rainwater accumulation contains 2 links of collection and storage.Rainwater collection should follow the principle of suiting measures to local conditions and making full use of rainwater resource,using local materials and reducing the costs;It should put stress on cellar storage in storing rainwater.Rainwater utilization contains potable water for people and livestock,developing courtyard economy,processing agricultural and sideline products,developing water saving for estry and dry farmingetc.,it is a technique of multi-founctions,lower cost and high benefits,it is the effective way to improve the society, develop the economy and construct the ecosystem in mountain areas.