The paper aims to meet the requirements of socialism with Chinese characteristics for the high-level development of ideological and political education curriculum and the cultivation of high-quality talents in the new era, and carry out the research on the reform of ideological and political education curriculum with professional knowledge as the carrier and classroom teaching as the medium. Based on the ideological and political construction background for food additive course, the knowledge-ability-quality (KAQ) ideological and political education training mode integrating knowledge, ability and quality on the "Trinity" training concept were put forward in this paper, so as to solve the problem, such as the differences between the cultivation of talents and social needs for higher education in China, and the quality of talents could not meet the actual needs of industries. Different teaching methods, such as refining the ideological and political elements of course, integrating the party history story into the course teaching, problem-oriented heuristic online teaching design, enriching classroom teaching and teaching means, reforming the course evaluation system, the questionnaire was used to improve the teaching and were also used respectively to achieve the ultimate goal of ideological and political education while improving students' professional knowledge. The results showed that 92.0% of the respondents believe that the score distribution proportion of food additive is reasonable, and 96.8% of the respondents were agreed with the teaching model. It can be seen that the teaching reform was widely recognized by the students who choose this course. Therefore, the case contents of cultural self-confidence, realistic innovation, integrity and professional ethics education should be integrated into the food additive course. We should make full use of the educational role of ideological and political education on contemporary college students and make the common improvement of professional education and moral cultivation realized.