The content and brand communication of the city’s overseas social media accounts is an important part of the overseas image communication of Chinese cities. This study selected 106 well-known cities in China as samples，counted and analyzed the activity data of 439 Facebook，Twitter，Youtube and Instagram accounts that maintained operation in each city in 2019，and analyzed the content of popular posts. Studies have found that Beijing and the pearl river delta city clusters，Yangtze river delta city clusters and bohai sea cities accounts active degree is high，which actively promote the Chinese culture，showing China’s image. “Web celebrity city” social account user stickiness. This study proposes to integrate communication resources，strengthen the ability of agenda setting，pay more attention to cultural identity strategies in cross-cultural communication，and enhance two-way interaction with overseas social media users.