在评述黄土高原地区小流域能量投入产出现状和国内外有关研究动态的基础上，分析了研究地区基本自然条件和能量投产情况，并制定了该区小流域能量流分析程序，包括确定范围、划分和调查子系统、能量计算、指标分析及能流图绘制。以黄家二岔小流域为研究对象，设定了小流域系统的基本结构和能量流分析方法。 On the basis of reviewing the status quo of energy input and output in small watersheds in the Loess Plateau and relevant research developments both at home and abroad, this paper analyzes the basic natural conditions and energy production in the study area and formulates the energy flow analysis program for small watersheds in this area, including determining the scope, Divide and survey subsystems, energy calculation, index analysis and energy flow charting. Taking Huangjia Erchao catchment as the research object, the basic structure of the small watershed system and the energy flow analysis method were set up.