The utility model relates to a divarication blood vessel stent for the therapy of pathological change of a blood vessel divarication position. The utility model is composed of a distending and support part and a covering part, the distending and support part is connected with the covering part, the distending and support part is positioned in a branch blood vessel, and the covering part is positioned on a connecting position of a main blood vessel and the branch blood vessel. An integral structure is formed by connecting structure units of the distending and support part and the covering part in a smooth exceeding mode, the structure units of the distending and support part and the covering part present different shapes, the distending and support part is used for distending and supporting the branch blood vessel, and the covering part is used for covering the pathological change of an opening position of the branch blood vessel. During the course of transportation, before the covering part is opened, the structure units of the covering part are mutually restricted in the radical direction and can not be separated, and the safety of the course of the transportation is ensured. After the coveting part is opened, the structure units of the covering part can be mutually separated along the radical direction, and the pathological change of the opening position of the branch blood vessel is efficiently covered. The utility model has the advantages that the design is reasonable, the assembly of the structure units of the distending and support part and the covering part are various, and the therapy effect is good, and the utility model is mainly used for the therapy of the pathological change of various blood vessel divarication positions.