The invention belongs to the technical field of wifi networking, and particularly relates to a distributed wifi networking link backup method. The method comprises the following steps of: in a networking topology, distinguishing a connection link from a backup connection, monitoring the communication quality of two connections in real time, and dynamically switching link links in real time according to the link quality of the two links, wherein the communication quality between network topology networking nodes is kept at an excellent level, the link quality is dynamically monitored, configuration is not needed, the link switching speed is high, and the actual user experience is not affected. According to the distributed wifi networking link backup method, link links can be dynamically switched in real time, the communication quality between network topology networking nodes is kept at an excellent level, the link quality is dynamically monitored, configuration is not needed, the linkswitching speed is high, and the use experience of an actual user is not affected.