With the rapid development of the Internet，the provincial mainstream news websites are becoming strong teams. At the same time，they should perform more extensively social responsibility. According to the responsibility index system of new media social which is built in our project，the evaluation analysis shows that compared with the national news websites，provincial mainstream news websites have a certain gap in performing their social responsibility，and their functions are always missing at a different：information is lack of originality and localization：content and platform about social supervision is weak：cultural education content is unbalanced：the control over entertainment content is not strict：online interactive effect is poor，and so on. Therefore，the paper proposes some improving strategies to enhance provincial mainstream news websites’ social responsibility：strengthen news originality and localization in the aspect of information production：expand the content of the social supervision and guide correctly public opinion：pay attention to cultural communication，check on entertainment content：and train professional talents：play platform’s full role to realize virtuous interaction of the public.