Connecting structure and method for indirect air-cooling system

The invention discloses a connecting structure and method for an indirect air-cooling system. The connecting structure comprises a pipe plate with a pipe penetrating area, a header and a supporting piece; the header is mounted in the mode of being matched with the pipe plate, the header is connected with a first part of the pipe plate, and the first part is a part close to the edge of the long side of the pipe plate; and the supporting piece is arranged between the pipe plate and the header and can be extruded by the pipe plate and the header in a matched mode, and a second part, connected with or abutting against the pipe plate, of the supporting piece is located between the first part and the pipe penetrating area. According to the structure, by additionally arranging the supporting piece capable of serving as a deformation supporting point of the pipe plate on the position close to the connecting part of the pipe plate and the header, the deformation of the pipe plate can be reduced, compared with the mode of increasing the thickness of the pipe plate in the prior art, the improving mode of adjusting the boundary condition to reduce the bending moment of the pipe plate and reduce the deformation of the pipe plate from the mechanics principle, the adding quantity of materials used by the pipe plate can be decreased, the connecting and sealing effects of the pipe plate and theheader can be further remarkably improved, and the risk of liquid seepage or even leakage is reduced.