Shield tunneling machine stacking split starting automatic conveying trolley auxiliary tool and construction method

The invention discloses a shield tunneling machine stacked split starting automatic conveying trolley auxiliary tool which comprises a vertical buttress joint, a vertical supporting pier joint, a vertical supporting pier joint, a vertical supporting pier joint, a vertical supporting pier joint and a vertical supporting pier joint, and the vertical supporting pier joint is vertically arranged and provided with a bracket inner cavity; the hydraulic jacking oil cylinder is vertically arranged in the inner cavity of the bracket; the supporting bracket is mounted at the telescopic end of the hydraulic jacking oil cylinder; the safety buttress is used for bearing the stacking trolley, and the upper trolley and the lower trolley are stacked together to form the stacking trolley; and the horizontal conveying frame is transversely arranged outside the stacking trolley, one end of the horizontal conveying frame faces the shield, the other end of the horizontal conveying frame is close to the stacking trolley, and the h