Inorganic fiber spraying is a new type of environmentally friendly architectural coating. It is mainly composed of inorganic fiber and water-based adhesive. After mixing, it is sprayed by an air pressure pump. It is mixed with atomized water and sprayed onto the substrate that needs protection to form a coating. The coating can meet the requirements of sound absorption, thermal insulation, and fire protection. This material is lightweight, non-toxic and odorless, has sound absorption, good weather resistance, efficient heat insulation, reliable fire resistance, and can achieve high fire resistance limit protection of more than 5 hours. It is suitable for fire protection of buildings and tunnels, especially for high-rise steel structures with relatively high fire resistance requirements. It is also suitable for thermal insulation and sound absorption of buildings and thermal insulation and energy saving of mechanical equipment.