In this research，by constructing an analysis model of the influence of urban red cultural resources，the dissemination status of Guangzhou’s red historical sites in an all-media environment is taken as a research object，and a comparative analysis is carried out in conjunction with the transmission data of Red historical sites in Shanghai and Wuhan. This study found that the Red historical sites in Guangzhou have insufficient overall exposure，uneven distribution of communication influence，and insufficient information integrity in the all-media environment. It is recommended to further enhance the proportion of Red cultural elements in Guangzhou’s urban culture and fully leverage existing media resources to enhance the exposure of Red cultural resources，innovate the use and re-creation of Red cultural content，and take advantage of Guangzhou’s unique Red cultural resource inventory in the Guangdong-Hong Kong-Macao Greater Bay Area and build an important base for the dissemination of Red culture both internally and externally.