Online education is the direction of the future development of higher education in China. How to improve the initiative of college students in online learning and research the satisfaction of MOOC platform will provide useful reference for the development of online education. Based on the ACSI model and the characteristics of the online learning platform, this study studied five latent variables, learning expectation, service quality, learning satisfaction and continuous learning intention, a set of online learning satisfaction evaluation system including 21 measurement variables was designed. In order to find out the key factors affecting the satisfaction of online learning service, this paper uses PLS-SEM to analyze the loading of each index, and on this basis, makes an empirical analysis of college students in Shanghai in the form of questionnaire survey. The results show that the factors affecting the satisfaction of online learning platform are learning expectation, service quality and perceived value.