The utility model discloses an overhead transmission line combined-type insulator suspension string which is characterized in that the overhead transmission line combined-type insulator suspension string comprises a hanging plate (1); the hanging plate (1) is connected with a ball head hanging ring (2); the ball head hanging ring (2) is connected with a porcelain core composite insulator string set (3) composed of a plurality of porcelain core composite insulator strings; the porcelain core composite insulator string set (3) is connected with 1-2 antifouling porcelain insulators or glass insulators (4); the antifouling porcelain insulators or the glass insulators (4) are connected with a bowl head hanging plate (5); the bowl head hanging plate (5) is connected with a suspension wire clamp (6); and the suspension wire clamp (6) is connected with a carbon fiber complex core lead (8). According to the utility model, the electrical performance, the insulating performance, the creepage distance and the steep wave voltage resistance level of the porcelain core composite insulator strings are ensured; in addition, the safe and reliable operation of the porcelain core composite insulator strings in an overhead transmission line adopting the carbon fiber complex core lead is ensured, the full life cycle is achieved, cleaning is avoided, and the maintenance workload is reduced.