A method and device for clock synchronization are provided by the embodiments of the present invention. The method includes the following steps: the clock synchronization level of the Access Point (AP) in the Femto is broadcast in the system broadcast message of the micro base station Femto; taking the received AP with higher clock synchronization level as the clock synchronization source, the AP adjacent to the Access Point (AP) achieves the clock synchronization with the synchronization source. With the self-organization idea, the embodiments enable the AP to form a best clock synchronization network automatically in various complex scenes, hence maintain the plug and play and configuration-free property of the AP and reduce the workload of the system maintenance.
