The Outbreak has exerted profound influence in education sector worldwide. Hence, online teaching has emerged. The purpose of this article is to discuss the role of Rain Class in online college English teaching during this special period. In the study, the key method was a questionnaire survey, which was conducted among the college students from different provinces with an average age of 21. Questionnaires were attributed to 100 college students. The study's results highlighted the benefits and challenges confronted by college students having online lessons via Rain Class. Data collected reveal half students think Rain Class greatly promote their listening ability. Lacking of interaction, 62% students do not feel that they have improved their language skills by studying purely online. The results also demonstrate students' preference for "online plus offline" mode because they can concentrate on class well and listen class repetitively. In addition, the findings confirm that most students can't focus on study and weak Internet connection may influence learning efficiency. In short, the findings indicate that in order to improve English learning skills and increase learning efficiency, teachers should focus more on transforming teaching mode to let as much as possible students participate in class.