China's climate is diverse. The precipitation in the loess area is relatively small, and the spatial and temporal distribution is uneven. However, water is an important factor for vegetation restoration and reconstruction. The redistribution effect of water in loess soil is very obvious, and the drought and wetting are complicated, which makes the ecological construction in the loess area more difficult. At present, the research on soil moisture in forest land has developed from qualitative description to quantitative analysis, and the research objects also involve different scales such as landscape, ecosystem, community, population and individual. Some achievements have been made in research methods, research content, and technical support. A soil moisture meter can be applied to the study of soil moisture. In the 1980s, Chinese Academy of Sciences organized experts to investigate, measure and evaluate various resources in the Loess Plateau, and obtained a relatively perfect soil water distribution law. Experts believe that the soil moisture status in the loess area is affected by factors such as climate (rainfall, temperature and evaporation), soil (soil type, soil texture), geomorphological factors, vegetation and human activities. According to the main factors (water source, storage and utilization) reflecting soil moisture status, the loess is divided into: semi-humid soil water cycle compensation area, semi-arid soil water non-period compensation area, arid soil water deficit area and irrigation soil moisture compensation. Area. Based on the above four districts, it is further divided into 11 sub-regions. In 1992, Mr. Yang Wenzhi divided it into five compensation zones according to the characteristics of soil water use in the loess area. In 2000, Mr. Yang Wenzhi divided the Loess Plateau into six water-eco-regions through years of rainfall, dryness, water storage at the end of the dry season at 0~2m soil layer and water storage at the end of the rainy season of 2~5m soil, providing vegetation construction for the Loess Plateau. The scientific basis for the macro layout. By using the soil moisture analyzer to study the soil moisture in different watersheds in the loess area, it can be concluded that the water conditions in the loess area are formed by the influence of vegetation ecology, soil environment and water environment. The distribution of tree species in the vegetation community indicates that the plants are In harmony with environmental conditions, the establishment of artificial vegetation should be based on the environment. Anesthesia Medical Co., Ltd. , https://www.jssinoanesthesias.com