Abstract: Under the background of regular epidemic prevention and control, online teaching in colleges and universities has continued its important status during the epidemic period, and has been widely used in teaching practice. In view of the problems existing in the application and practice research of online teaching in colleges and universities and the hot spot of theoretical research, such as on the level of teaching communication means, on the interactive teaching mode and on the transformation of teaching theory, this paper puts forward three countermeasures: improving the communication means of online teaching, enhancing the participation of online teaching and optimize the underlying logic of online teaching platform, to provide reference for improving the efficiency of online teaching in colleges and universities.

Key words: Epidemic situation, Colleges and universities, Online teaching, Efficiency