Makes a comparison between modern 10 kV and traditional 6 kV power supply systems in the areas of both economic stability and electronic safety. Analyzes excellence of 10 kV underground power supply and voltage grade at underground coal mine. The advantages of using isolation transformer in 10 kV power supply system is concluded.%从经济可靠性和电气安全性两个方面，对矿用10kV供电系统与传统6kV供电系统进行了比较，分析了我国煤矿生产采用10kV电压下井供电的优势，对我国井下工作面的供电现状和电压等级的选取作了介绍，并对在井下10kV供电系统中使用隔离变压器的优点进行了阐述。
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