The invention discloses an application method of an electric tower positioning device. The electric tower positioning device comprises laser emitting members arranged before and after an electric tower, a base point inspection card, and a laser inspecting and positioning member. The application method comprises the following steps: (1) selecting a site, and installing and fixing the laser emitting members; (2) adjusting the directions of the lasers emitted by the laser emitting devices; (3) moving the laser inspecting and positioning member to a designated position; (4) fixing the laser inspecting and positioning member through a telescoping pedal and marking; (5) according to the mark, positioning the electric tower. According to the method, the characteristic of linearity of laser is utilized, the sound and laser are combined to realize precise positioning in a long distance, and the efficiency is high. The structure is simple, the device is easy to carry, the visibility is strong, moreover, the operability is strong, the positioning is accurate, the requirements of rapid and efficient construction of lines for the basic power supply departments can be met, and thus the method has a good popularization and application value.