Abstract: Soil and water loess is very serious in the Loess Plateau. Water shortage is a key factor that restricts the vegetation survival and growth. In order to study the effect of the new mulching material, namely, non-textile, on the soil and water conservation, the soil water content and soil temperature under different level trenchs mulched non-textile treatments and CK treatment with the single factor test method during growth stage of the tree in the north mountain of Lanzhou City were analyzed. Results show that the non-textile has the function of preserving heat and soil water content. Mulching non-textile can accommodate and reduce daily range of soil temperature, and 500 g/m2 level mulched treatment is the best among different treatments. Mulched treatments can heighten soil water content to certain degrees comparing with CK treatment, but there are no significant statistics differences among different mulched levels. 400 g/m2 mulched level has a significant statistics difference effect on soil water content comparing with CK treatment. Mulched non-textile can preserve soil heat, save water and benefit the plant growth, and it has a better spread prospect in foresting the sloping field and greening the wild region in the Loess Plateau.