The invention belongs to a quick-opening valve of a double-blind-tube structure, and particularly relates to a valve for a recirculation system of a containment vessel of a nuclear power station. The quick-opening valve comprises a valve cover, a piston chamber and a valve body, wherein the valve cover is connected with the piston chamber, and the piston chamber is directly connected with the valve body; a piston is arranged in the piston chamber, a piston ring arranged on the side of the piston is hung under the valve cover through a tension bolt, the tension bolt is provided with a weak cross section, and a buffering component is arranged below the piston; blind tubes are arranged in the inlet end and the outlet end of the valve body, and sleeves are arranged at the end parts of the blind tubes; a buffering plate and a bottom plate are arranged at the bottom of the valve body, wherein the buffering plate is connected with the valve body, buffering tubes are laid on the buffering plate, and the bottom plate is connected with the valve body through bolts; a position indicating component is arranged on the side of the bottom of the valve body. The quick-opening valve has the advantages that the flow channel of the valve is of the double-blind-tube structure, the blind tubes are of the integral structures which are completely sealed, and the zero leakage under the closed state of the valve is ensured.