Abstract: The conventional method to prevent the bad information from overflow in Internet is slow on response with complicated procedures. A new BGP-based network address blocking system was therefore proposed to solve the problem, where a bad websites address distribution system was setup with a private AS number used as the identifier of network blocking point. With the multi-hop mechanism, the session between the bad websites address distribution system and network blocking points was implementing, then the configuration of black hole at network blocking points blocked the access to bad websites address. The deployment of the prototype system showed that after the verification of a bad network address which has been accused, the distribution system will transmit the bad network address to all blocking points in seconds so as to block the target network address quickly. The blocking system can be deployed in carrier networks to effectively prevent the bad information from its diffusion.