Reinforced graphite gasket is an important sealing element, which is widely used in petroleum, chemical industry, metallurgy, power generation, shipping and other industries. It is the key part of static sealing of pressure pipes, valves, pumps, heat exchangers and other equipment in China. Expanded graphite cutting gasket, also known as flexible graphite gasket, is punched or cut from expanded graphite coil or plate. Expanded graphite does not contain binder and filler, so it has high purity, good corrosion resistance, high and low temperature resistance, good compression resilience and high strength. It is suitable for sealing low-pressure parts, and can prevent electrochemical corrosion between graphite and flange. The surface of existing graphite gaskets is often smooth, When the flange surface is uneven, there will be a gap between the flange and the graphite gasket, which greatly reduces the sealing performance, fails to achieve a good sealing effect, brings inconvenience to users, and causes economic losses. At the same time, the existing graphite sealing rings are mostly simple sheet-like structures, which are prone to dislocation when fixed and used, resulting in poor sealing and greatly increasing the installation cost.