Abstract: In order to meet the requirements of "no reduction in teaching standards, no discount in teaching effect", we carried out the design and practice of student-centered online teaching. We explored the teaching mode of " online course learning as the main + online live video teaching as a supplement + flipped teaching as the promotion". Good practice effect was achieved through exploration and optimization of live broadcast teaching effect, construction of systematic network course learning community, exploration and innovation of flipped online teaching. Practice showed that this teaching model achieved good practice effect. The practice of student-centered online teaching design helped to promote the development of information education, which also provided a reference for optimizing and improving offline teaching and improving the teaching design ability of university teachers.

Key words: COVID-19 epidemic, student-centered, biology course, online teaching, teaching design