Microhollow cathode discharge (MHCD) is a novel, nonequilibrium, high-pressure, direct current glow discharge.An overview of the research progress on the foundational theory of the MHCD was presented.

• 微空心阴极放电是一种新颖的、非平衡、高气压辉光放电.；综述了微空心阴极放电的基本原理;