For the butterfly valve, the butterfly plate rotates around the vertical axis of the valve body by 90°to open or close the passageway, wherein the sealing structure includes elastic sealing structure, multilevel sealing structure, etc. For the butterfly valve with multi-eccentric structure, the sealing pair thereof during the opening/closing process has small mechanical wear. Generally, the butterfly valves can be widely applied as the equipment for cutting off or connecting and roughly adjusting the fluid in the pipelines for petroleum, chemical product, metallurgy, electric power, food, medicine, water supply and drainage, gas delivery, etc., and the butterfly valves configured with pneumatic or electric actuators, etc. can be used to realize remote operation. Less