The invention relates to a conic node valve structure. The conic node valve structure comprises a lifting device and a sealing device, wherein the lifting device comprises a conic cavity and an air bag arranged in the conic cavity; the air bag is connected with the conic cavity through an air bag upper connecting plate; the lower part of the air bag is also connected with an air bag lower fixing plate; the lifting device comprises an upper fixing plate, a sealing gasket and a pressure plate; the pressure plate fixes the sealing gasket onto the upper fixing plate; the conic cavity is fixedly connected with the bottom surface of the pressure plate through a guide rod and a nut. Compared with the prior art, the conic node valve structure has the advantages that the conic cavity is adopted, the possible phenomenon of material separation during material supplement of an existing butterfly valve can be effectively avoided, and the utilization of the air bag avoids leakage caused during hopper sealing when an air cylinder is used and can avoid the phenomenon of blocking of a rod of the air cylinder.