The elastic metal sealed butterfly valve is a key new national product. The high performance elastic metal sealed butterfly valve adopts a double-eccentricity and a special inclined cone elliptic sealing structure. It solves the problem of traditional eccentric butterfly valves, in which the sealing surface is still in sliding contact friction when closing from 0° to 10° instantly. It realizes the separation of the sealing surface as soon as the butterfly disc begins to open and achieves the effect of sealing as soon as it closes, thus extending its service life and achieving the best sealing performance.