External hanging tower crane lower supporting structure and attachment joint thereof

The invention discloses an external hanging tower crane lower supporting structure and an attachment node thereof.The external hanging tower crane lower supporting structure comprises a lower supporting main rod used for being connected to an external hanging tower crane supporting main beam, a lead screw is slidably connected to the lower supporting main rod, and a connecting lug plate used for being connected with a wall is installed at the end, relatively away from the lower supporting main rod, of the lead screw in the sliding direction; the lower supporting main rod is provided with a telescopic oil cylinder used for driving the lead screw to slide in the axial direction of the lower supporting main rod, the end, relatively away from the connecting lug plate in the sliding direction, of the lead screw is connected with the telescopic end of the telescopic oil cylinder, and the lower supporting main rod is provided with an anti-shearing bolt used for locking sliding of the lead screw after the lead screw