A lumen stent (2, 42, 43, 44, 45) comprises a first tube body (21, 421, 431, 441, 451) and a second tube body (22, 422, 432, 442, 452). The second tube body (22, 422, 432, 442, 452) is sleeved outside the first tube body (21, 421, 431, 441, 451) and has at least one end in hermetic connection with the outer surface of the first tube body (21, 421, 431, 441, 451). The second tube body (22, 422, 432, 442, 452) comprises a thin film body (222) that covers at least part of the first tube body (21, 421, 431, 441,451) and a second radial supporting structure (221) that is disposed in a maximum radius-length region (L) of the thin film body (222) and surrounds the maximum radius-length region (L). The second radial supporting structure (221) has radius supporting property. After the implantation of the lumen stent (2, 42, 43, 44, 45), a semi-enclosed gap (20) can be formed between the first tube body (21, 421, 431, 441, 451) and the second tube body (22, 422, 432, 442, 452), or a semi-enclosed gap (20) can be formed between the second tube body (22, 422, 432, 442, 452) and a tube wall (12), so that blood flowing into the gap (20) can serve as filling material to block off a type I endoleak channel and prevent blood from flowing into a tumor body or an interlayer position.
