土壤表面蒸发阻力是计算土壤蒸发率的关键参数。本文讨论土壤表面蒸发阻力的概念，一层、二层理论模型与经验模型，并以在澳大利亚进行的田间测定为例，说明田间测定与计算方法。并以计算沟中的蒸发率为例，介绍其应用方法。 Soil surface evaporation resistance is a key parameter for calculating soil evaporation rates. This paper discusses the concept of soil surface evaporation resistance, first and second level theoretical models and empirical models. Taking field measurements in Australia as an example, the field determination and calculation methods are described. And to calculate the evaporation rate in the ditch, for example, describes its application method.