本文从原始的裘布衣假设模型进行分析,得出其存在的缺陷,主要包括忽略垂直分量引起的误差;处理稳定流问题时我们应该取消影响半径的概念,淡化稳定流与非稳定流之分,以非稳定流理论(包括稳定阶段)统一思想和工作方法;以及井损、水跃值引起的误差等问题的论述,以及一些改进方法。 In this paper, the original hypothesis model of fur clothing is analyzed, and its defects are found, including the errors caused by ignoring the vertical components. When dealing with the steady flow problem, we should cancel the concept of influencing radius and dilute the difference between stable and unsteady flow, Uniform flow theory (including the stable phase) unified thinking and working methods; as well as well damage, water jump error caused by the discussion, as well as some improvements.