Gas meter assembly with high-low pressure self-closing function

The invention discloses a gas meter assembly with a high-low pressure self-closing function, and relates to the technical field of gas meters, the gas meter assembly comprises a self-closing assembly arranged on a gas meter body, a gas inlet and a gas outlet are formed in the gas meter body, the self-closing assembly is arranged at the position, corresponding to the gas outlet, of the gas meter body, and the self-closing assembly comprises a shell; a gas transmission channel communicated with an inner cavity of the gas meter is arranged in the shell, a cutting-off mechanism for automatically cutting off the gas transmission channel during overpressure and underpressure is arranged in the shell, the cutting-off mechanism comprises a guide core detachably arranged in the shell, a vent hole is formed in the guide core, a plugging rod is movably arranged on the guide core in the axial direction, and the plugging rod is movably connected with the shell. According to the scheme, through the gas meter provided with