The utility model discloses a tunnel buffer structure applied to a surrounding rock creep condition. The tunnel buffer structure comprises a primary support, a protective layer, a buffer air cushion layer and a secondary lining which are sequentially supported under a tunnel from outside to inside, wherein the thickness of the primary support is 20-25cm; the protective layer is double-layer geotextile and is fixed on a base surface formed by the primary support; wherein the air pressure of the buffer air cushion layer is 0.1-0.5 MPa, and the buffer air cushion layer is fixed on a basal plane formed by the protective layer; and the secondary lining is a reinforced concrete layer with the thickness of 48-52cm. The buffer air cushion layer is arranged on the periphery of the tunnel, the problems existing in the prior art can be effectively solved, the buffer air cushion layer is arranged between the primary support and the secondary lining, part of creep stress can be released, stress ofthe secondary lining is reduced, and the stress of the secondary lining is uniform. Due to the fact that the air cushion layer made of the PVC high polymer material is good in sealing performance, a common waterproof layer used in a tunnel can be replaced, construction cost is reduced, and the process is economical and reliable.