Heating furnace calcium silicate board is composed of hard calcium silicate hydrate and reinforced fiber, does not contain asbestos, and is resistant to high heat resistance temperature up to 1050 °C, which is an energy-saving product. It has excellent characteristics such as high heat resistance, strong thermal insulation performance, low bulk density, high specific strength, good durability, corrosion resistance, can be cut, and can be sawed and convenient construction, and can be widely used in energy-saving and thermal insulation projects of industrial kilns. This product is composed of quartz and lime through dynamic hydrothermal synthesis of the main crystal phase hard calcium silica, this cactus globular microporous structure determines the excellent performance of the product in thermal insulation technology