This standard specifies the terms and definitions, classification and specifications, requirements, test methods, inspection rules, labeling, packaging, storage and transportation of civilian sanitary masks. Civil health masks are divided into children's masks and adult masks according to the age of the wearer. According to the size of civilian sanitary masks, the specifications are divided into large (L), medium (M), and small (S). This standard sets out specific requirements for the basic requirements, appearance requirements, bacterial filtration efficiency, particle filtration efficiency, ventilation resistance, formaldehyde content, microbial indicators, etc. for civilian sanitary masks.