The invention belongs to the field of passive heat transfer, and relates to a large-scale ring type pulsating heat pipe. The pulsating heat pipe comprises an inner pipe 1, an outer pipe 2, a metal wire 3, a copper ring 4, a sealing ring 5, a gas-liquid channel 6 and a U-shaped elbow channel 7, wherein the inner tube 1 and the outer tube 2 are coaxially arranged, the metal wire 3 with the diametersmaller than the thickness of an annular gap is penetrated at the annular gap formed between the inner tube 1 and the outer tube 2, the metal wire 3, the inner tube 1 and the outer tube 2 are tightlyattached through adopting a mechanical method, the copper ring 4 and the sealing ring 5 are sequentially sleeve at the two sides of the inner tube 1, and then the two sides are welded and sealed intoa whole; and an hole is formed at one side of the copper ring 4 to weld a liquid filling pipe. The large-scale ring type pulsating heat pipe has the advantages of being high in space utilization rate,large in heat flow density, good in heat transfer efficiency and heat transfer limit, stable in operation, flexible in installation and arrangement, excellent in anti-gravity operation characteristics, easy in realizing large scale of the single pulsating heat pipe and the centralized arrangement of multiple heat pipes, compact in structure, small in size, light in weight and low in cost, and issuitable for industrial mass production.