Abstract: Aiming at the problem of emergency repair of transmission line tower which is difficult to recover quickly after tower collapse, a modular composite emergency repair tower is developed based on the concept of modular structure design. The development of this type of composite repair tower is discussed from the aspects of material process selection, modular structure design, safety, technical characteristics and advantages, the composite repair tower is composed of composite main rod, insulated cross arm, cable-stayed insulator, carbon fiber cross brace, basalt base and other modules.The results show that this type of modular emergency repair tower can effectively realize the rapid recovery of the power transmission line after the collapse of the tower, and the safety performance is good. After the application of the telescopic herringbone gin pole, it is especially suitable for the temporary quick restoration of power supply after the collapse of the tower accident in complex environment and on-site emergency drill, and has the application value of popularization.