The utility model discloses a thin-wall metal heat exchange tube protective structure comprising a non-metal inserted sleeve disposed between a metal deflection plate and the thin-wall metal heat exchange tube. The non-metal inserted sleeve is like a U shape, and two ends of the non-metal inserted sleeve are provided with positioning bosses. The utility model is novel and unique, and has a simple structure, reasonable design, abilities of greatly reducing the production difficulties of the rare noble metal thin-wall heat exchange tube, effectively improving the reliability of the equipment, prolonging the service lifetime of the equipment, reducing the cost loss caused by scratches on the surface of the thin-wall metal heat exchange tube or the deformation even fracture of the thin-wall metal heat exchange tube, and facilitating the promotion and application.