A clustering method, comprising: sending, by a first device, a beacon frame comprising a cluster probe information element IE to a synchronization device and a second device over a target large bandwidth channel, wherein the cluster probe IE comprises information indicating timeslots reserved by the first device, the second device and the synchronization device; adding one timeslot to a notification period NP of a next variable beacon interval VBI, and listening for, in the timeslot, an extended cluster report IE returned by the synchronization device, wherein the extended cluster report IE comprises cluster synchronization information and control information of the synchronization device, and the NP comprises a first NP and a second NP, wherein the first NP is used for the first device to send a beacon frame on a large bandwidth channel and the second device to receive the beacon frame on the large bandwidth channel; and the second NP is used for the second device to send a beacon frame on the large bandwidth channel and the first device to receive the beacon frame on the large bandwidth channel; if the extended cluster report IE returned by the synchronization device is detected in the timeslot, extracting the cluster synchronization information and control information of the synchronization device, and monitoring the target large bandwidth channel in a beacon service period Beacon SP, so as to detect whether the Beacon SP is occupied by another cluster member; and if an empty Beacon SP is detected, sending a beacon frame in the empty Beacon SP on the target large bandwidth channel, setting a corresponding Clustering Control field, joining a target large bandwidth cluster as a cluster member, adding the cluster synchronization information of the synchronization device and a sequence number of the empty Beacon SP to a cluster switch announcement IE, and sending, by using a beacon frame in a next first NP, the cluster switch announcement IE to the second device, so as to instruct the second device to monitor the target large bandwidth channel and join, when an empty Beacon SP is detected, the target large bandwidth cluster; wherein the first device and the second device are synchronization pair devices, and the beacon frame is a directional multi-gigabit beacon frame in a 60GHz technology. sending, by a first device, a beacon frame comprising a cluster probe information element IE to a synchronization device and a second device over a target large bandwidth channel, wherein the cluster probe IE comprises information indicating timeslots reserved by the first device, the second device and the synchronization device; adding one timeslot to a notification period NP of a next variable beacon interval VBI, and listening for, in the timeslot, an extended cluster report IE returned by the synchronization device, wherein the extended cluster report IE comprises cluster synchronization information and control information of the synchronization device, and the NP comprises a first NP and a second NP, wherein the first NP is used for the first device to send a beacon frame on a large bandwidth channel and the second device to receive the beacon frame on the large bandwidth channel; and the second NP is used for the second device to send a beacon frame on the large bandwidth channel and the first device to receive the beacon frame on the large bandwidth channel; if the extended cluster report IE returned by the synchronization device is detected in the timeslot, extracting the cluster synchronization information and control information of the synchronization device, and monitoring the target large bandwidth channel in a beacon service period Beacon SP, so as to detect whether the Beacon SP is occupied by another cluster member; and if an empty Beacon SP is detected, sending a beacon frame in the empty Beacon SP on the target large bandwidth channel, setting a corresponding Clustering Control field, joining a target large bandwidth cluster as a cluster member, adding the cluster synchronization information of the synchronization device and a sequence number of the empty Beacon SP to a cluster switch announcement IE, and sending, by using a beacon frame in a next first NP, the cluster switch announcement IE to the second device, so as to instruct the second device to monitor the target large bandwidth channel and join, when an empty Beacon SP is detected, the target large bandwidth cluster; wherein the first device and the second device are synchronization pair devices, and the beacon frame is a directional multi-gigabit beacon frame in a 60GHz technology.