Positioning method and positioning system of optical cable connection tower

The invention discloses a positioning method of an optical cable connection tower, which is realized based on a Brillouin optical time domain reflection technology, and comprises the following steps: firstly, obtaining a basic Brillouin frequency shift curve of a to-be-measured optical cable, and analyzing the obtained basic Brillouin frequency shift curve, to determine the connection tower welding point information of the to-be-detected optical cable; then, according to the information of the fusion point of the connection tower, determining the length of the optical cable between adjacent optical cable connection towers and the length of the optical cable between the fusion point of the connection tower and the test point; and finally, determining a tower information base of the line where the to-be-tested optical cable is located according to the determined optical cable length between the adjacent connection towers, the optical cable lengths of the welding points and the test points of the connecting towe