Connecting structure for additionally installing elevator on old building

A connecting structure for additionally installing an elevator on an old building relates to an elevator connecting structure and comprises a plurality of standard floors, each standard floor comprises a stand column, an elevator shaft ring beam, a waiting hall precast slab and a corridor precast slab, and the stand columns penetrate through the elevator shaft ring beam, the waiting hall precast slab and the corridor precast slab respectively. The upper standard layer and the lower standard layer are connected together in a grouting connection mode that the overhanging steel bars are matched with the grouting sleeves; one end of the elevator shaft ring beam is connected with the waiting hall prefabricated slab, the left side and the right side of the waiting hall prefabricated slab are connected with the multiple corridor prefabricated slabs correspondingly, and the multiple corridor prefabricated slabs are connected with one another and communicate with the whole floor. The elevator shaft ring beam, the wait