Protective unloading method for existing building door opening structure

The invention discloses a protective unloading method for an existing building door opening structure, which comprises the following steps of: protecting two sides of the bottom of the door opening structure by using edge covering structures respectively, sequentially installing a bottom beam, side columns, a top beam, a transverse connecting piece and an edge sealing component, connecting the components into a whole, tightly propping an adjustable supporting leg against the door opening structure, and cutting and transferring the door opening structure. The method is suitable for protective unloading of historical buildings such as a stone storage door, and the door opening structure can be integrally protected in the unloading, transferring and storing processes; edge covering structures, bottom beams, side columns, top beams, transverse connecting pieces, adjustable supporting feet, edge sealing components and the like used in construction can be quickly mounted and dismounted, potential safety hazards cau