In the new media era, China needs to rely more on forces outside the government to mobilize groups and the general public to carry out various forms of public diplomacy. Big data not only provides a platform for public diplomacy, but also improves diplomatic capabilities. Blog, Weibo Colorful social media, such as WeChat, have enriched the form and connotation of diplomacy. Different countries have a different histories, cultures, and different levels of development, and public diplomacy needs to distinguish different audiences. Big data can be used as a reference for different groups' preferences, thinking methods, and value tendencies. Department, to provide a precision-oriented evaluation system for public diplomacy, in order to achieve the effect of "dive into the night with the wind, moisturizing and silent". The text is intended to emphasize:. ['New Features of State Diplomacy in the New Media Age.', "Big data's support and promotion of public diplomacy.", 'The positive influence of social forces on government diplomacy.', 'New requirements for information technology in the new diplomacy.']