The invention discloses a rod piece combined type composite insulator bush for high-voltage transmission line maintenance.The rod piece combined type composite insulator bush comprises at least two telescopic devices (1), first gripper devices (2) and second gripper devices (3), wherein each first gripper device (2) and the corresponding second gripper device (3) are arranged at the two ends of the corresponding telescopic device (1) respectively.According to the rod piece combined type composite insulator bush for high-voltage transmission line maintenance, maintenance personnel are protected through cooperation of the telescopic devices and polyester bands, and construction personnel can be prevented from falling from the high altitude; the integral structure is reasonable in design and light, operation is easier, construction efficiency can be easily improved, and construction difficulty can be easily lowered; by means of the movable design feature, the work range of construction personnel is broadened, and operation is easier and more convenient; by means of the design of the alternate structure of the telescopic devices and the polyester bands, construction personnel can work in various gestures; the requirement for operation between high-voltage lines with different distances can be met, and very high field adaptability is achieved.