In the context of rapid development of industrial Internet integrated application,the teaching content and methods of traditional PLC are relatively lagging.This paper discusses and analyzes the teaching of PLC course in detail.The teaching content integrates the practical cases of industrial Internet integrated application,makes full use of online course resources,increases the relevant knowledge of domestic PLC series products,and highlights the application of industrial Internet network communication protocols.The teaching process is guided by the working process of industrial Internet actual project,divides the sub-tasks of industrial Internet application project,and uses modern informatization technology,hardware equipment platform and virtuality-reality combination teaching methods to make the PLC course teaching meet the development needs of industrial Internet.