The invention discloses a lumen stent. The lumen stent comprises a main tubular body, two inner branches, two outer branches and developing markers, the two inner branches and the two outer branches are communicated with the main tubular body separately, and the developing markers are used for positioning the inner branches and the outer branches; the main tubular body comprises a first main bodysegment, a taper segment and a second main body segment which are connected in sequence, the far ends of the inner branches are connected to the taper segment, and the near ends of the outer branchesare connected to the taper segment; the two inner branches are located between the two outer branches, included angles between the inner branches and the adjacent outer branches in the circumference direction are 60-80 degrees, and an included angle between the two outer branches in the circumference direction is 170-180 DEG C. The lumen stent has the advantages that by reasonably designing the positions of the inner branches and the outer branches, interference of the developing markers among the four branches can be effectively avoided, and interference of extension stents sleeving the fourbranches is prevented.