Abstract: “Elementary Circuit Analysis”is a professional basic course for electronic information engineering，communication engineering and other majors in colleges and universities.The course needs a close combination of theory and practice，and plays a connecting role in professional curriculum system.Due to strong theoretical nature and abstract and boring content of the course，students are faced with problems of poor learning interest and poor learning effect in teaching process.Combined with the mature internet technology，teaching mode based on flipped classroom was constructed，teaching system of the course was improved，and teaching quality were improved.