The invention provides an automatic synchronization method for forwarding and configuration of data among automatic power dispatching systems based on a management channel. The automatic synchronization method comprises the steps of newly establishing a management channel, and transmitting configuration information by adopting an extended standard power transmission protocol; and deploying automatic synchronization function modules respectively in receiving and transmitting systems, finishing a configuration synchronization and configuration customization mechanism through automatic configuration synchronization sub-modules and automatic configuration customization sub-modules in the receiving and transmitting systems, and realizing automatic synchronization of the configuration information. The problems such as fussy process, poor reliability and low efficiency of a manual maintaining mode can be solved, and the current maintaining requirements for a great forwarded data size and frequent configuration change are met.