Gas well single well gas recovery system and low-pressure recovery method thereof

The invention discloses a gas well single well gas recovery system and a low-pressure recovery method thereof. The gas well single well gas recovery system comprises a downhole oil bush, wellhead gas recovery device, a wellhead gas recovery valve group, a gas collecting station and a synchronous rotation pressurizing integrating device which are sequentially connected through a gas recovery main pipe. The synchronous rotation pressurizing integrating device is disposed on the gas recovery main pipe between the wellhead gas recovery valve group and the gas collecting station. The low-pressure recovery method includes setting the synchronous rotation pressurizing integrating device on the well field behind of the wellhead gas recovery valve group. By the synchronous rotation pressurizing integrating device added to the gas well single well gas recovery system, liquid accumulated at shaft bottom can be discharged simply, efficiently, safely and reliably, gas-liquid mixed transportation synchronous pressurizing is achieved, single well yield of middle-late-period natural gas wells is increased, and cost and energy consumption of gas well production are lowered.