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