As a new media form that has been extremely popular in recent years，short video apps have been harvesting enormous economic benefits. At the same time，short video apps also become a major focus of internet ecological governance. However，at this stage，the governance of short video apps still mainly rely on policies issued by relevant departments，supplemented by the self discipline of the short video industry. This study explores the self-discipline role of short video apps in short video governance through text analysis of the user service agreements of 9 short video apps. The study shows that there are large differences in specific content and expressions in terms of active reminders and service terms，while content expressions in terms of privacy policies and internal management norms have high consistency. There is a certain degree of imbalance between the rights and obligations of the short video apps and those of the users. We believe that short video apps should be more active in reminding users of service agreements，the power and responsibility mechanism between the platform and users should be further improved，and the advantages of platforms should be combined in specific content and expressions to highlight featured contents，and strengthen the self discipline of short video apps in China，so that a healthy network ecological environment can be built.