In order to realize the optical fiber positioning for each pole tower

and monitor the running status of Optical Power Ground Wire（OPGW）more accurately

this paper presents a method of positioning fiber optic cable based on distributed optical fiber sensing technology.By analyzing the real-time monitoring frequency shift data and combining with the structure and erection of OPGW

it is found that the frequency shift of the optical fiber is smaller than that of the mid span due to the connection of the fittings.Therefore

we can identify the location of the tower from the difference and achieve the precise positioning of the transmission line tower.Finally

the feasibility of the location method is verified by referring the line information.