The invention discloses a gas film reinforced concrete dome bin construction mechanical device mainly composed of a center column foundation, a center column, a hydraulic joint capable of rising and falling, a rotation mechanism, a telescopic suspension arm I, a telescopic suspension arm II, a hydraulic cylinder I, a hydraulic cylinder II, a hanging basket I, a hanging basket II, a hanging hook Iand a hanging hook II. The center column foundation is on the lowest portion. The upper face of the center column foundation is connected with one end of the center column. The center column is composed of multiple tower crane standard joints. The outer portions of the tower crane standard joints are connected with the hydraulic joint capable of rising and falling. The upper portion of the hydraulic joint capable of rising and falling is connected with the rotation mechanism. According to the gas film reinforced concrete dome bin construction mechanical device, a construction operation platform is provided through a tower crane construction machine, a traditional scaffold operation platform is replaced, the operation efficiency is greatly improved, and the construction cost is reduced. Byusing the gas film reinforced concrete dome bin construction mechanical device, the labor intensity of workers is lowered, and insurance of the construction quality is facilitated.