Abstract: In order to improve the practical innovation ability of college students, this paper combines the stage results obtained in the Innovation Training Project “PID MCU to control the speed of DC motor” and incorporate it into the comprehensive experiment of undergraduate.We analyze present the status quo of the innovation training project and ,the implementation steps and methods in the comprehensive experimental teaching.The practice shows that after applying the innovation training project to the comprehensive experiment, we can enlarge the benefit of the students, get more students to participate in the innovation training project, enrich the comprehensive experiment teaching, strengthen the effect of open experiment and thus improve the students practice ability and innovation ability.