In the digital era，social media platforms have become an important field for professional news producers to carry out communication practices. This paper takes microblog，a typical social media platform，as an observation point and conducts an empirical study on the performance of social responsibility of chinese media microblogs in 2022. On the whole，media microblog can better perform its social responsibilities，especially in the dimension of “information production”，but the performance level of “value guidance”，“culture and education” and “communication and coordination” needs to be improved. Professional media with press release qualification and cognitive authority perform their duties on the microblog platform significantly better than institutional we media. Faced with the pressure of traffic，the survival state of multiple development，the principle of “immediacy” of news reports and the real-time update of hot news，some media microblogs have problems such as weak awareness of interview verification，insufficient depth of communication content and unsatisfactory communication efficiency. Media microblog should stick to the bottom line of interview and verification，adhere to the depth of communication content，cultivate the diversity of public information consumption，become a provider of high-quality information with public service spirit and a defender，interpreter and demonstrator of public communication concept，and strengthen relational thinking in communication practice，focusing on communication and empathy.