The invention provides a positioning device of an electric power pole tower. The positioning device comprises a laser emission component, a datum point inspection board and a laser inspection positioning component which are distributed from front to back, wherein laser emitted by the laser emission component is directly emitted to the datum point inspection board; laser lines are collected by the datum point inspection board and are refracted to a laser induction sounder by a triple prism on the laser inspection positioning component; a supporting rod is arranged on the lower part of the laser inspection positioning component. According to the positioning device, the characteristic that the linearity of laser is good is applied and sounds and light are combined, so that the remote accurate positioning is easy to realize and the efficiency is high. The positioning device of the electric power pole tower is simple in structure, convenient to carry, high in visuality, high in operability and accurate in positioning; the requirements on rapid and efficient construction of lines of basic-level power supply departments can be met and the positioning device has very good popularization and application values.