Cylinder flange coaxial positioning and bonding tool and method for installing cylinder flange

The invention belongs to the technical field of bonding tools, and discloses a barrel flange coaxial positioning bonding tool which comprises a base (1) and a flange supporting frame (2), and a longitudinal pulley supporting frame (3) and a transverse pulley supporting frame (4) which are capable of ascending and descending are arranged on the two sides of the flange supporting frame (2) respectively. The flange supporting frame (2), the longitudinal pulley supporting frame (3) and the transverse pulley supporting frame (4) are all fixed to the base (1) and located on the same straight line based on the base. Coaxial positioning of the barrel and the flanges can be achieved, and the problems of coaxiality and relative axial positioning of a plurality of middle flanges of the barrel and the barrel are solved by adjusting a bonding tool lifting device. The invention further discloses a method for installing the barrel flanges through the tool, the method can be suitable for simultaneous bonding of multiple flan