Fire-retardant board is made from superior vermiculite material, which is expanded at a high temperature of 800°C to form expanded vermiculite. This is then mixed with fire-resistant adhesives in a specific ratio. The board is produced through a series of processes including shaping and high-temperature curing. It features light weight, high strength, good flexibility, heat insulation, fire resistance, and ease of installation. It has a combustion performance rating (A1) and material smoke toxicity rating (ZA1), making it suitable for widespread use in high-rise frame buildings, communication pipelines, fireplaces, ovens, high-speed trains, kilns, fire door cores, aluminum plants, and steel mills, among other industries.