Abstract: Under the background of the epidemic situation, the multi platform linkage online teaching mode based on micro class is adopted to deeply explore the whole process closed-loop online teaching mode of "teacher led and student-centered", and carry out teaching practice and research. The teaching effect of this teaching mode is evaluated through the statistics and analysis of background data such as students' learning achievements in the whole process and teaching participation indicators. The research shows that the multi platform linkage teaching mode of immunology test theory course based on micro course can better complete the teaching tasks and improve the participation of students in classroom activities, but it needs careful design by teachers and is not suitable for long-term separate application.

Key words: Immunological test, Theory course, Micro class, Multi platform linkage, Online teaching