By analyzing the causes of the Sabina vulgris death at the Sabin vulgaris nature conservation zone of Shenmu county in northern Shaanxi province, the component of microorganism community which inhabited the stiffer surface soil layer that appeared on the surface of the Sabina vulgaris sandy soil was studied. According to the characteristic such as the Sabina vulgaris growth feature, the climate in this region, the natural conditions and soon, suggestions and reflections which profit to sand are presented.