With the widespread implementation of COVID-19 prevention and control measures during the pandemic, online classes have become a normal and indispensable part of college students' lives. Analysis of the factors affecting college students' behavioural intention towards online classes will help improve online class quality. This paper sets up a model to analyse the factors that may affect such intentions . The results show that social influence, performance expectancy, effort expectancy, perceived usefulness and perceived ease of use have a significant positive effect on college students' behavioural intention, and enabling environment(i.e. the infeasibility of offline teaching due to the pandemic)has a significant negative effect on it. Gender and voluntariness, as moderator variables, also clearly influence behavioural intention. Based on pandemic prevention and control measures, along with education reform and modernisation, this paper offers valuable suggestions to online learning platform and education administrators.