The utility model relates to a power transmission line obstacle-removing robot, comprising a cabinet body internally equipped with a control system and a moving mechanism driving the cabinet body to move along a power transmission line. The cabinet body is of a streamline form. The outer surface of the cabinet body is a smooth curved surface. The cabinet body is ellipsoidal or spherical and is formed by enclosure of cabinet walls. The power transmission line obstacle-removing robot of the utility model employs the streamline cabinet body which, compared with conventional rectangular cabinet bodies, is capable of effectively reducing the wind resistance of the robot at high altitudes and maximally preventing the problem that the robot swings due to blowing wind during the high-altitude work.