With the widely extension of plastic mulch technique in Xinjiang region

the key problems

such as water and salt movement characteristics in isothermal and non-isothermal condition and the mechanics of plastic mulch technique which can prevent soil slat from moving to surface layer

haven't been probed moredeeply. Based on the experimental data of isothermal redistribution and evaporation with entirely plastic mulch of Xinjiang salinized soil for the same period

after infiltration with different wetting depths

their characteristics of soil water content profiles have been compared

and the results shows a little difference

which showed plastic mulch's significance on water saving; Base on that

the soil salt content and soil salt concentration profile are compared and shows a little difference too

which indicated that temperature gradient had no obvious influence on soil water and salt movement and showed plastic mulch's significance on anti-salinization. Later

the functional relations of soil salt content as well as soil salt concentration with vertical position and infiltration depth were developed. The researches in this paper showed the characteristics and mechanics of plastic mulch which preventing soil salt from moving to soil surface.