The invention relates to a transport beam structure of a converter transformer, and belongs to the technical field of transformer transport equipment. According to the technical scheme, the transport beam structure comprises transport plates (1), transport baffles (2), a fixing device (3), a transformer oil tank (4) and transport holes (5); the transport plates (1) are symmetrically fixed to the two corresponding side walls of the transformer oil tank (4) respectively, and the thickness of the transport plates ranges from 30mm to 80mm; the multiple transport holes (5) are formed in the transport plates, and the transport baffles (2) are connected with the transport plates; sawtooth patterns are arranged on the surfaces of the transport baffles and the surface of the fixing device (3), the transport baffles are meshed with the fixing device through the sawtooth patterns, and the thickness of the transport baffles ranges from 40mm to 90mm. The transport beam structure has the advantages that the structure is simple, space on the side walls of the transformer oil tank is fully utilized, and space is saved due to the fact that the transport beam structure can be used as a transport beam in the transport process and also as a support of a BOX-IN structural part.