The utility model discloses a cable forming tool. The cable forming tool is easy to bend and has no damage to cables. The tool comprises a left support plate and a right support plate, wherein the two support plates are hinged to each other. The upper part of the left support plate and the upper part of the right support plate are fixedly and respectively provided with an arc-shaped wire duct with a downward opening. The left support plate and the right support plate are fixedly and respectively provided with a vertical plate located above the corresponding arc-shaped wire ducts. The arc-shaped wire ducts are fixedly connected with the corresponding vertical plates respectively. The inner side of the bottom of the left support plate and the inner side of the bottom of the right support plate are respectively hinged with a corresponding wrench. The top of each wrench is fixedly and respectively provided with a cylindrical bar corresponding to each arc-shaped wire duct.