Double-tube sealed nitrogen replacement band oil and gas band pressure leaking stoppage device

The utility model provides an oil and gas pipeline double-tube sealed nitrogen replacement band oil and gas band pressure leaking stoppage device, and relates to the technical field of pipeline systems. The device comprises a leaking stoppage device body (1), a sealing rubber ring (2), a leaking stoppage device sealing head (3), a seamless steel pipe (4), a gas check valve (5), ball valves (6), a pressure meter (7) and a lever block (8); after two pipes located on the upper portion inside the leaking stoppage device body (1) and communicated to an inner pipe are guided out, the two pipes are respectively connected with one ball valve (6), the nitrogen replacement seamless steel pipe (4) is connected on the rear portion of one ball valve (6), the pressure meter (7) is connected on one side of the one ball valve (6), the gas check valve (5) is connected on the rear portion of the other ball valve (6), and the nitrogen replacement seamless steel pipe (4) is connected on the rear portion of the gas check valve (5