In this study，31 provincial mainstream news portals in China’s mainland were taken as the objects of observation. Based on the evaluation index system constructed by the general theory，6049 samples were sampled and analyzed. The results show that the overall situation of social responsibility in provincial-level mainstream news portals is good，but there are still problems that need to be improved，such as higher scores in information production，but there are deficiencies in depth and overall；topics are “hardened” in social supervision. There are differences between regions；communication awareness in culture and education is weak；coordination is valued，but interaction is not effective. Therefore，the following aspects are worthy of attention：to maintain the advantages of information production，to play a new media integration function；to form a social supervision of the combined effects of both hardware and software；to promote the resonance of culture and news，enhance the education function of the site；play a platform advantage，innovative communication methods and quality.