The invention discloses a cable sleeve which comprises two semi-cylindrical pipes. The lower portion of the first half cylinder is provided with a first fixing plate, the first fixing plate is provided with a first connecting hole, the upper portion of the first half cylinder is provided with a first connecting plate connected with the outer cylindrical surface, and the first connecting plate is provided with a third connecting hole perpendicular to the axis of the first semi-cylindrical pipe. The lower portion of the second half cylinder is provided with a second fixing plate connected with the second outer cylindrical surface, the second fixing plate is provided with a second connecting hole, the upper portion of the second half cylinder is provided with a second connecting plate connected with the outer cylindrical surface, and the second connecting plate is provided with a fourth connecting hole perpendicular to the axis of the second semi-cylindrical pipe. The third connecting hole and the fourth connecting hole are connected through a bolt and a nut, the first fixing plate and the second fixing plate are connected through a connecting shaft, and the first semi-cylindrical pipe and the second semi-cylindrical pipe are hinged though a connecting shaft. The cable sleeve is simple in structure, high in safety reliability and convenient to use, install and dismount, facilitates steel pipe erection, placement and adjustment after a cable penetrates a steel pipe and improves the working efficiency.