The invention belongs to the technical field of a cable, and especially relates to an easily assembled self-supporting cable. The cable is composed of a cable part and a supporting wire part. The cable part comprises a cable core and a sheath layer. The cable core comprises power transmission conductors or optical fibers. The supporting wire part comprises tensile elements and a supporting wire protective layer. The cable part and the support wire part are mutually independent. A composite groove is arranged in the sheath layer. The composite groove is composed of a vertical groove and a horizontal groove. The horizontal groove does not contact with the edge of the sheath layer. Connection convex strips are connected out of the supporting wire protective layer. The connection convex strips are composed of vertical convex strips and horizontal convex strips. The supporting wire part is formed integrally. The vertical convex strips can be placed in the vertical slot. The horizontal convex strips can be placed in the horizontal groove. After assembly, the connection convex strips cannot be drawn out along the axis direction of the vertical groove. The cable has the advantages that the manufacturing method is simple, the yield of the finished product is high, the universality is high, the construction and winding are more convenient, the capacity of the cable can extended flexibly, the construction is convenient, and the comprehensive cost is low.