Early dismantling construction method for enclosure structure of near subway group pit construction

The building envelope early-dismantling construction method for near subway group pit construction comprises the steps that a first batch of deep foundation pits are constructed in a pit jumping mode in the length direction of a trestle, and after the first batch of deep foundation pits are constructed to a basement top plate, a top plate is adopted for supporting on the trestle and a building envelope; earth excavation, supporting and structure construction of the first batch of shallow foundation pits right opposite to the first batch of deep foundation pits and the remaining deep foundation pits in the same direction are started; when the remaining deep foundation pits in the same direction are constructed to a foundation bottom plate, earth excavation, supporting and structural construction of the deep foundation pits on the side relatively away from the trestle are conducted, and when construction is conducted to a B1-layer floor, earth excavation, supporting and structural construction of a second batch