Digital multicast system

The invention claims a method for distributed with the digital of multiple multimedia program channels receiving broadcasting system from the program supply the user seat through the digital network. Channel transmission of the system with digital user line access port for receiving groove and a receiving to the telephone rows of user. Which has a state accessing unit, the direct-current accessing unit comprises each user storage customizing a clamping block is files' data memory, is or rejects each user visit based on customer configuration file to the channel. The program signal of each seat of digital can process and is a corresponding user configuration file access. Multicast video gateway to the state accessing unit is makes the user to a client configuration file end of the online updating; each user using corresponding digital decoder playing video gateway via the is accesses.