Under the background of COVID-19 epidemic, to protect the health and safety of teachers and students, the Ministry of Education issued the guidance on "classes suspended but learning continues". In view of the problems such as the difficulty of online teaching, the low participation of students and the poor learning effect of experimental courses in colleges and universities, the innovative teaching method of experimental courses in colleges and universities based on the cloud platform of numerical calculation is proposed. The method solves the boring problems of engineering experimental courses during the epidemic period effectively, and improves students’ interest and learning efficiency. Through the actual operation of the cloud computing platform and numerical calculation software, it improves students’ ability to understand and solve engineering practical problems. In addition, based on the summary of engineering practical problems, it improves students’ scientific research quality and lays a good foundation for the development of their scientific research path.