Abstract: Online and offline blended teaching is one of the five golden courses. The formulation of teaching tasks and objectives should be challenging. With the help of diversified teaching methods, teaching innovation can be achieved, and high-level cognitive goals can be achieved through reasonable teaching design. From the optimization of teaching objectives,systematic teaching mode,diversified teaching methods,diversified evaluation methods and the achievement of students' learning objectives, this paper discusses the construction method of online and offline hybrid gold course of concrete structure design principle.The teaching practice proves the effectiveness of the construction method and realizes the teaching concept of "student-centered". The construction method can be used for reference and promotion of other similar majors in order to accelerate the pace of the construction of golden course.

Key words: Online and offline, Gold course, Concrete structural design principle