In the current era of mobile Internet，with the maturity of wireless broadband networks and 4G technologies，the cost of public use of networks has become gradually low. Flow is no longer a barrier to the spread of mobile terminals. The public has broken the limitation of time and space in acquiring and disseminating information，based on the mobile short video of the mobile intelligent terminal，which quickly rises and develops. In this study，five influential and representative mobile short video applications were selected as the research objects，and the new media social responsibility index system was measured. The study finds that in the first-level indicators，the scores of “information production” and “cultural education” indicators are at a medium level，and there is still much room for improvement. However，the scores of “social supervision” and “coordination relationship” are all lower and exposed a series of problems. The purpose of this study is to examine the status of mobile short video applications in fulfilling new media social responsibilities，and to provide suggestions for countermeasures and development on the basis of these problems.