Abstract: Using organic waste material asmulch for soil cover is a technicalmeasure for regulating soilmoisture content to improve plant growth under natural cultivation condition. Based on field experiment the changes of soil moisture content under different thickness of organic mulch and in different places of cover band were studied. In comparison with a bare soil the soil moisture content was significantly increased on soil surface layer in the middle of cover band. The edge effect was also significant on soil surface layer. The effect iveness of soil cover on soil moisture content decreased with the increase of soil depth, at 20 cm soil depth the effect of soil cover on soilmoisture content was not significant.