With the rapid advancement of China's "Internet plus Education" plan, "Internet plus Education" has become a research hotspot. The outbreak of COVID-19 pandemic has brought great opportunities, tests and inspections for online education. All schools earnestly implemented the relevant requirements of the Ministry of Education and leverage the strengths of the Internet to ensure that "suspension of classes and non-stop teaching". Taking a middle school in the west part of China as an example, the online survey was conducted to investigate its live broadcast teaching. The independent sample test and one-way analysis of variance were used to statistically analyze the differences among the students' genders, grades, home location, type of device used and parental companionship. Finally, the implications were put forward to provide a reference for live teaching practice.