As an important part of the network news communication pattern in China，it is of great significance to study the fulfillment of social responsibility of commercial portal website. This study takes Tencent，Sina，Netease，Sohu and Phoenix as the research objects. Based on the empirical data，the performance of social responsibility of commercial websites is comprehensively evaluated through the evaluation index system of social responsibility of commercial websites. The results show that the performance of social responsibility of large commercial websites is generally good，but there are still some problems，such as inadequate original level，weak social supervision links，consensus building need to be improved，and large differences in user experience level. On this basis，this paper discusses the effective ways to enhance the level of social responsibility performance of commercial websites，including improving the dissemination of high-quality content，promoting credibility with a correct guidance，building interactive channels to enhance public opinion guidance，and enhancing social friendliness with user thinking.