Abstract: As one of safety refuge “six major systems” in underground coal mines, the self-saving device of mine pressure ventilation has a new combination type, which is mask type. At present, the current standard MT 390-1995 Technical Conditions of Self-saving Device of Mine Pressure Ventilation does not manage and require the mask type. This paper, based on this standard, supplements technical requirements and tests methods of the mask type, and explains the structure, composition and naming of the mask type. Finally, with the management requirements of safety certification, the paper explains the technical requirements and test methods of mask type.