以内蒙古锡林郭勒盟太仆寺旗不同深度土壤含水量为研究对象，设定不同的降水等级，剖析不同降水等级下土壤含水量对降水的脉动响应，并分析其响应的影响驱动机制，为干旱半干旱区开展生态保护措施和农业活动提供相应的科学依据。基于太仆寺旗一个坡面上20个自动土壤水分观测站2016和2017两年逐时土壤含水量数据和同时间段该地区日降水数据，利用统计学分析方法，将降水事件分级作为独立事件，继而分析土壤含水量在不同降水等级下对降水事件的响应。首先分析了该区降水的变化趋势和土壤含水量的变化趋势，发现土壤水分的波动变化和降水保持同步。其次对比分析不同地形部位和不同植被覆盖下土壤含水量对降水响应机制的变化，剖析坡位和植被因素在土壤含水量对降水响应中的作用。结果表明：太仆寺旗内日降水事件发生频率最高的量级在0-10mm，属于小雨事件；降水量最大的降水量级在25-50mm，属于大雨事件。在降水事件发生后，表层土壤含水量的响应最明显；在小雨事件中，仅有坡顶的土壤含水量有明显响应，中雨和大雨时三个坡位（坡顶、坡中和坡脚）的表层土壤均表现出明显响应。草地的土壤水分含量＞过渡地区＞灌木区，过渡地区土壤水分的响应最为明显，呈现先下降，后上升再下降的W模式。

Taking soil water content at different depths in Taiwusi Banner, Xilin Gol League, Inner Mongolia as the research object, different precipitation levels were set to analyze the pulsation response of soil water content to precipitation under different precipitation levels, and the driving mechanism of its response was analyzed to provide the corresponding scientific basis for ecological protection measures and agricultural activities in arid and semi-arid areas. Based on the hourly soil moisture content data of 20 automatic soil moisture observation stations on a slope in Taiwusi Banner in 2016 and 2017 and the daily precipitation data in the same period, the precipitation event classification was taken as an independent event by statistical analysis method, and then the response of soil moisture content to precipitation events under different precipitation levels was analyzed. Firstly, the variation trend of precipitation and soil water content was analyzed, and it was found that the fluctuation of soil water was synchronized with the precipitation. Secondly, the response mechanism changes of soil moisture content to precipitation under different terrain parts and different vegetation coverage were compared and analyzed, and the roles of slope position and vegetation factors in the response of soil moisture content to precipitation were analyzed. The results show that the highest frequency of daily precipitation events in Taiwusi Banner is 0-10mm, which belongs to light rain events. The maximum precipitation is 25-50mm, which is a heavy rain event. After the occurrence of precipitation events, the response of surface soil water content was the most prominent. In light rain event, only the soil moisture content at the top of the slope showed obvious response, while the surface soil at the top, middle and foot of the slope showed obvious response during moderate rain and heavy rain. The soil moisture content of grassland was > transition area > shrub area, and the response of soil moisture in transition area was the most obvious, showing a W pattern of first decreasing, then increasing and then decreasing.