This paper introduces the basic concept of CDIO(conceive, design, implement, operate) engineering education mode,Pointing at and the lack of the existing problems in the teaching activities of the electric circuit experiment in colleges and universities. This paper discussed, in detail, the reform of the experimental teaching of electric circuit based on CDIO. The teaching reform method, which is based on the project design and the teaching method of various computer aided software, is proposed to train students' creative interests and innovation ability. A new performance evaluation method is proposed, which takes the mutual evaluation and self evaluation of the project members, and changed the way in which only the teacher was evaluated, Improved the leading role of students in the experiment. Practice shows that in the training of students' professional skills, team cooperation ability, engineering ability to achieve a good touch results. Practices show that the reform achieves better results in the experimental teaching of circuit. Keywordselectric circuit; reform of teaching;engineering education ; CDIO; competence education