The invention provides a cable duct bank plugging water-leakage-proof set, which comprises an elastic inner sleeve of a circular truncated cone body, and an elastic outer sleeve sleeving the circular truncated cone body outside the elastic inner sleeve, wherein a large-diameter end of the elastic inner sleeve and a small-diameter end of the elastic outer sleeve are of an integrally-formed structure; a lap-joint seam is formed in the side surface of the elastic outer sleeve, and the lap-joint seam is in a sawtoothed shape; and the outer side wall of the elastic inner sleeve is provided with more than four main keels and auxiliary keels which are adjacent to the main keels. The cable duct bank plugging water-leakage-proof set utilizes the advantage of good elasticity of rubber for sealing a tube opening, effectively solves the problem of insecure sealing caused by irregular tube opening, is simple in structure and convenient to user, can be completed by simple construction, and greatly improves working efficiency.