The course "Arc Welding Power Supply and Control" is a professional basic course for welding technology and engineering major,with strong theoretical and practical characteristics. In view of the existing problems in the teaching process,such as the disconnection between theory and practice,the weak foundation of students’ power electronics technology and so on,this course integrates knowledge impart,ability cultivation and value shaping,applies modern information technology to the whole teaching process,constructs a unique SPOC platform and teaching resource database,and puts forward a real-time and rapid application teaching method.Through the offline first-class course teaching reform,the better teaching effect is obtained.