Network course education is different from traditional teaching method and it has gradually developed into a new type of teaching method. At present, many people give priority to the technicality and education of network courses while ignoring its usability. However, if the network course interface is not equipped with high usability, it is difficult for network course education to continue. Therefore, the usability analysis of network course interface is of great significance for the optimization of network course learning. Based on the virtual reality system, this paper analyzes the usability of the network course education and network course interface and draws the conclusion that the usability design of the network course interface should follow the principles of consistency, comprehensibility, teaching, fault tolerance and interactivity. At the same time, targeted evaluation criteria should be established, including simple and natural dialogue, reducing the memory burden of users, technical adaptability and humanization of learning support. 50 network courses are randomly selected for evaluation and it is discovered that the personalized requirements of students have not been given enough consideration in the design process of network course interface in China. In the future, the network teaching process should be student-centered so as to improve the quality of network course education