The invention relates to the field of construction, in particular to a salvage method for a large-diameter pile buried hammer. Equipment adopted by the salvage method comprises a punching pile machine, a new larger pile hammer, a small pile hammer, a positioning pulley, a movable pulley block, a guide wheel, an added winch, a slurry pump, a slurry conveying pipe and slurry. The punching pile machine comprises a main winch and a secondary winch. The main winch, the new large pile hammer, the small pile hammer and the positioning pulley form a new punching system. The secondary winch, the slurry pump, the slurry conveying pipe and the slurry form a slurry circulating system. The added winch, the movable pulley block and the guide wheel form a lifting system. The salvage method includes the following steps of A, positioning of the punching pile machine, B, assembling of the new punching system, C, installation of the movable pulley block, D, installation of the added winch and the guide wheel, E, assembling of the new lifting system, F, assembling of the new slurry circulating system and grouting, G, punching operation with the large pile hammer, H, punching operation with the small pile hammer, I, lifting with the lifting system and J, accomplishment of salvage of the pile buried hammer.