Abstract: A hierarchy distributed route structure based on IPv6 address in peer to peer systems is proposed in order to solve the problems that physical topology and logical network do not match so as to inefficient search in distributed hash table at present.By building node identifier using IPv6 address and hashing different level clustering identifier to set up hierarchy route，near nodes in physical network are closer in overlay.Lower search latency and higher efficiency are proved.Meanwhile，multi-keywords is hashed to hierarchy key identifier according to the weights so that the similar documents are gathered at adjacent nodes.Multi-keywords search is implemented and similar data search efficiency is improved.