Objective　To evaluate the application effect of online CBL teaching method under the background of emerging infectious diseases. Methods　With the help of network platforms

using CBL teaching method

through the students viewing online cases

making analysis and summary

and then sending online

in the form of interaction between teachers and students

the teaching work during the epidemic was successfully completed. Finally

the teaching effects of the two semesters before and after the epidemic were compared by means of total semester scores and questionnaires. And chi-square test and t test was adopted for statistical analysis. Results　The practice proved that online CBL teaching method could help students to achieve the same teaching effect as the traditional teaching method in the teaching of infectious diseases. Conclusion　Therefore

online CBL teaching method is worth popularizing in the background of emerging infectious diseases.