The utility model discloses a modular multi-kinetic inspection device for a power transmission line. Including a fuselage core, the motor is rotationally connected with the turntable; a mounting groove is formed in the middle of the turntable; a movable block is mounted on the inner side of the mounting groove in a sliding manner; a clamping rod is fixedly mounted at the end part of the movable block; a first spring is fixedly mounted at the other end of the movable block; the clamping rod is arranged on the inner side of the fixing frame; the fixing frames are fixedly mounted at the left endand the right end of the mounting plate. The mounting plate is fixedly mounted in the middle of the blade; a fixing sleeve is fixedly mounted in the middle of the mounting plate, a positioning grooveis formed in the inner wall of the fixing sleeve, a limiting rod is arranged on the inner side of the positioning groove, a second spring is fixedly mounted at the end of the limiting rod, the limiting rod is arranged on the inner side of a through hole, and the through hole is formed in the middle of the clamping base. The equipment is high in working efficiency, convenient to use and high in applicability, and the arms can be conveniently and quickly replaced to adapt to various working environments.