Disclosed is a switching network synchronization method, which is applied to a first switching device. The method comprises: receiving a first suspected target ID; the first suspected target ID being an ID corresponding to a suspected target switching device determined by an access device connected to the first switching device according to a first identity number ID; receiving via the access device a second suspected target ID sent by a second switching device; the second suspected target ID being an ID corresponding to a suspected target switching device determined by the second switching device; determining a first target ID according to the first suspected target ID and the second suspected target ID; and the first target ID being an ID corresponding to a target switching device. Also disclosed is a first switching device, an access device and a storage medium.