Database synchronization method and device

The embodiment of the invention relates to the technical field of databases, in particular to a database synchronization method and a database synchronization device, which are used for realizing the purpose that data synchronization processes of other target databases are not influenced when a certain target database changes. According to the database synchronization method and the database synchronization device, a source server is connected with target servers which are connected with target databases, and the target servers are configured with configuration parameters of the target databases, therefore, when the certain target database changes, if a new target database is added, only the configuration parameters in the target server which is correspondingly connected with the newly added target database need to be modified, and the target server is restarted, and the source server does not need to be restarted, therefore, the other target servers of which the configuration parameters are not modified do not need to be restarted, and the data synchronization processes of the target databases which are connected with the target servers of which the configuration parameters are not modified cannot be influenced.