Inorganic fiber spray is a new type of environmentally friendly building coating, primarily composed of inorganic fibers and water-based adhesives. After mixing, it is sprayed through an air compressor and mixed with atomized water before being applied to the base material to form a coating. This coating meets requirements for sound absorption, thermal insulation, and fire protection. The material is lightweight, odorless, non-toxic, has excellent weather resistance, high thermal insulation efficiency, and reliable fire resistance, providing over 5 hours of fire protection. It is suitable for fire protection in buildings and tunnels, especially for high-rise steel structures with stringent fire resistance requirements. It is also applicable for thermal insulation and sound absorption in buildings and energy-saving insulation for mechanical equipment.