The invention relates to a power transmission line electric tower shot blasting and derusting machine, and belongs to the technical field of electric transmission line electric power. A traditional shot blasting technology and a shot blasting technology are combined together, a coaxial differential mechanism is designed, and a shot blasting system and a feeding system of angle steel are integratedtogether, so that the lower surface of the angle steel can also be impacted by shot ceramic balls while the stepping of angle steel is completed. When rust is removed, the rust and the ceramic ballsfall onto a conveying belt together, and under the adsorption action of magnetic force, the rust on the conveying belt is adsorbed and moves reversely along with the conveying belt until magnetism onthe conveying belt disappears. The rust is scraped by a scraping plate on a chip collecting box, the ceramic balls moving along with the rust fall into a feeding hole of a vibrating feeding machine, rust particles doped in the ceramic balls are further screened out after vibration loading is carried out, and the clean ceramic balls run to the high position and are re-sprayed to the upper surface of the angle steel under the action of a high-pressure spray pipe.