The invention discloses an absorption tower body inversed installation device. Tower walls are lifted to complete installation of tower bodies, the problem of limited space when the tower bodies are installed positively is solved, and the installing accuracy such as the weld quality, the roundness and the perpendicularity of the tower bodies is ensured. The device is characterized in that the tower bodies are electrically lifted, and the loads of the tower bodies can be borne; and the device comprises a supporting unit, a lifting part and a power unit. The device is suitable for absorption towers with different diameters, the device can be matched with the diameters of the loads of the different tower bodies through changes of the outer diameter of an expansion ring, increase or decrease of the number of stand columns and increase or decrease of the number of electric blocks, and the device can be reused. The electric blocks are provided with safe limiting devices and are power and bearing core parts; and compared with a hydraulic jacking device, the problem of internal leakage of a hydraulic cylinder is avoided, and the extremely high safety is achieved. The device is arranged onan absorption tower bottom plate, is evenly distributed on the inner sides of the tower walls, and is compact in structure and small in occupied area.