The composite fire-resistant dense pressure plate has excellent fire resistance and sealing performance, and is suitable for a variety of environments. Its high strength and high temperature resistance make it perform well in high temperature and high pressure environment, such as fire fighting equipment, high temperature furnaces, etc. In addition, its excellent waterproof and moisture-proof performance makes it widely used in humid environments, such as basements and tunnels. Its high sealing performance makes it necessary to prevent gas and liquid leakage, such as chemical, pharmaceutical and other industries also have good applications. In short, the composite fire-resistant dense pressure plate is suitable for complex environments that require high temperature, high pressure, moisture-proof, and leakage-proof, providing safety guarantees for various equipment.