Abstract: In view of the problems found in the magnetic particle inspection operation of the fillet welds and butt welds of the base ring and tower drum of the wind power generation equipment, combined with theoretical knowledge and practical work experience, the magnetic particle inspection process has been deeply optimized. At the same time, the cause of the formation of magnetic marks are analyzed in combination with the tower material, welding process and the structure of the welding joint, and the problems that need attention in the magnetic particle inspection of the tower welding and the optimization measures are put forward.