The invention discloses a large LNG gasification and two-way pressure regulating integrated prying device. The large LNG gasification and two-way pressure regulating integrated prying device comprises a gasifier A, a gasifier B, a water bath type electric heating device, a pressure regulating device A, a pressure regulating device B, a safely diffusing device A, a safely diffusing device B, a metering device, an odorizing device, a pressure regulating and metering box and a base platform; the gasifier A, the pressure regulating device A, the safely diffusing device A, the metering device and the odorizing device are connected in series through pipes in sequence and are welded to the base platform correspondingly; and the gasifier B is connected to the gasifier A in parallel, the pipe between the gasifier A and the pressure regulating device A is connected with the water bath type electric heating device in parallel, and the pressure regulating device A and the safely diffusing device A are connected with the pressure regulating device B and the safely diffusing device B in parallel. The large LNG gasification and two-way pressure regulating integrated prying device is high in integrated degree and high in reliability, investment is saved, the construction cycle is shortened, operation is simple and convenient, and gas supply efficiency is high.