A spigot sealing device for a valve comprises a sealing spigot, a sealing part, a metal part, an inner framework ring and an outer framework ring, wherein the inner framework ring and the outer framework ring are symmetrical relative to the sealing spigot; and the thermal expansion and cold contraction degree of the sealing part under a high temperature difference condition is consistent with that of the sealing spigot through the limitation of the inner framework ring and the outer framework ring. By means of the spigot sealing device for the valve, the problem of a poor spigot sealing effect under the high temperature difference condition in a high and low temperature environment in the prior art is solved, and the spigot sealing device for the valve has the beneficial effects of being reliable in sealing at high temperature and low temperature and low in machining cost.