The utility model relates to a carrying device for bridge overall replacement. The carrying device comprises a vehicle frame, a motive power system, a running system and a hanging system, and is characterized in that the vehicle frame of the carrying device adopts a multi-module combined structure in longitudinal split joint, the hanging system is in hydraulic hanging, and modules are connected with the hydraulic system through a proportioning valve, so that wheel axles are in uniform loading arrangement. The carrying device for the bridge overall replacement has the advantages that the structure design is reasonable, the application range is wide, the modular dismounting and mounting combination of the vehicle frame can be carried out according to the carrying load, the longitudinal and transverse rigidity of the vehicle frame is higher, meanwhile, the parallel operation and the walking synchronization can be realized, and the morphological stability and the walking flexibility of carrying components are ensured.