Concrete structure is a core course of civil engineering with strong theory and practice. Taking the deep integration of Internet plus education as the background, on the basis of the existing research results and research, combined with the current teaching situation, respectively from the aspects of the clarity of mixed teaching objectives, the reconstruction of online and offline teaching content, the innovation of teaching methods, the improvement of assessment methods, the construction of teaching quality evaluation system and continuous improvement mechanism, etc. To carry out the research on the teaching reform and practical innovation of the concrete structure course, so as to provide reference for the normal development and continuous improvement of online and offline mixed teaching.