Guangzhou marathon is the world’s largest marathons since the outbreak of COVID-19，this paper first analyzes the guangzhou marathon sponsors and media cooperation，through the Guangzhou marathon WeChat public tweets analysis that Guangzhou marathon sponsor’s online promotion level is not clear，could not include all sponsors；In terms of broadcasters，Guangzhou Marathon can take into account newspaper media，network information platform，traditional TV broadcast and short video platform. The next part makes a three-dimensional analysis of the online attention of Guangzhou Marathon based on Baidu index，and holds that the golden marketing cycle of Guangzhou Marathon is one and a half months from the date of registration to the race day. There are big regional differences in the online attention of Guangzhou Marathon. Although the attention of Guangzhou Marathon has been greatly improved compared with the previous one，there is still a certain gap compared with the Shanghai Marathon. The way to create value of Guangzhou Marathon is mainly to create city calling card，drive comprehensive consumption and create flow value. In the last part of the article，the author puts forward some suggestions to extend the marketing cycle of the event，increase the related activities，strengthen the hierarchical management of sponsors，and promote the network communication.