Abstract: As characteristics of plastic sheet-covered for soil moisture conservation、warming and catchment.Effective overcome the unfavorable condition of in dry area drought and relative shor-tage of quantity of heat in our region.Make the spread speed of plastic sheet-covered cultivation technology is very fast.Generalized crop from vegetable develop up to maize、potato、 sunflower、soybean and so on in the eighties.It rises to 1063.6 million mu from 2 initial mu in 2008 in Exte-nsion area.Plastic sheet-covered cultivation technology from using single technique to diversified development.For many years,take full advantage of plastic sheet-covered the vast technicians in agriculture,overcome the problem in extension.Not only acquired remarkable effect in economy,but also more important is social benefit and science and technology achievements,make positive contributions to grain yield increase、agriculture benefit and farmers ＇ income.