Reverse construction method based on vertical high cutting supporting structure

The invention discloses a top-down construction method based on a vertical high cutting supporting structure, and relates to the technical field of buildings, the top-down construction method comprises the following steps: S10, preparing before construction according to design requirements; s20, drilling is conducted on a construction site according to design requirements, filling piles are installed, and all the filling piles are connected into a whole through cap beam construction; s30, side slopes are excavated at the bottoms of the cap beams in a segmented mode, and drainage pipes are installed; s40, an anchor cable hole is drilled in the pile body of the cast-in-place pile, an anchor cable is installed at the anchor cable hole, and the anchor cable is fixed through sectional type grouting; s50, a vertical baffle wall is prefabricated, the vertical baffle wall is connected with the side edge of the cast-in-place pile in a steel bar planting mode, and the vertical baffle wall and the cast-in-place pile are