Professional courses are the main support of ideological and political construction of courses. It is of great significance to integrate ideological and political education into professional courses. Taking the course of principles of steel structure as an example, this paper discusses the practical path of collaborative education of ideological and political courses and professional courses. People educating requires finding the direction and focusing on the key points. In this paper, taking teaching objectives as the main line, with professional knowledge as the background, five breakthrough points are found. Through the breakthrough points, the teaching objectives and ideological and political objectives are organically combined, the ideological and political elements contained in professional courses are deeply explored, and a complete value evaluation system is constructed. Paying close attention to the "main force" of teachers, the "main battlefield" of curriculum construction, and the "main channel" of classroom teaching, a complete new educational path through three teaching methods, three teaching steps, and one evaluation system is formed. Strengthening students' professional knowledge, enhancing students' "four self-confidences", and enhancing students' feelings of home and country, the teaching effect of teaching and educating people together and joint construction of major and ideological and political education has truly achieved. This study can provide reference for similar majors to carry out curriculum ideological and political education.