The invention discloses a method for carrying out data forwarding in different networks, which includes the steps of: using a database to record interface disposition records of each host, and reading the records at each host so as to support data and file acquisition and forwarding functions by each host in the communication process. Through a data synchronization mechanism of the database, the interface disposition records are synchronized to each distributed host. The data synchronization mechanism is to use SQL Server 2008 to change a tracking mechanism and obtain the change data, and uses an ACE communication library to perform remote data synchronization through Socket. The method for carrying out data forwarding in the different networks can realize the exchange and forwarding of the data of each private network in a safe manner.