The invention relates to a dynamic online interaction platform control method, a management background and an interaction platform. The method comprises steps: the management background generates a link address with a unique key, and an online interaction code related to the key is stored; the management background embeds the link address to a webpage code; when a front-end browser receives an access request on the webpage by the user, an interaction request is sent to the management background via the link address with the unique key; the management background returns the online interaction code related to the key to the front-end browser; the front-end browser loads the online interaction code related to the key, and an online interaction icon is displayed on the webpage. The outputted online interaction code is controlled through the dynamic request, the user can carry out real-time dynamic output interaction code parameter modification and control on a management background interface, the webpage code does not need to be modified, management flexibility of the online interaction platform is improved, and convenience is provided for the user.