本文综述了煤矿井下用电动机特殊的工况条件对电动机的要求;煤矿井下用电动机的发展;矿用水冷电动机与矿用空冷电动机的比较;矿用水冷电动机的适用范围及前景。介绍了矿用水冷电动机的各种典型的水路设计,以及在水路设计选择时应考虑的一些原则问题,并兼论1990年电机年会论文集中“煤矿用水冷电动机”一文中的某些错误和不足。 This paper summarizes the requirements of the electric motor under special working conditions of coal mine shaft; the development of underground motor; the comparison of mining water cooled motor and mining air cooled motor; the applicable scope and prospect of mining water cooled motor. This paper introduces all kinds of typical waterway design of mine water-cooled motors and some principle problems that should be considered in the design of waterway. It also discusses some mistakes in the article “Coal-water-cooled motor” insufficient.