Metal spiral wound gasket is a semi-metal flat gasket which is made of metal and non-metallic composite materials with spiral. With good compression rebound performance, a multi-channel seal and a certain degree of self sealing feature tight, less sensitive to the surface defects of the fang surface, on-bounding flange sealing surface, easy on, therefore, easy disassembly, It can be part of the elimination of pressure, temperature change and the effects of mechanical vibration.