The invention provides a finding and correlation method for a one-way flow uniform resource identifier (URI) under asymmetric routing. A network comprises a plurality of peer-to-peer gateway nodes (A, B, C and D) and a center scheduling node (S), wherein a network security system based on content scanning runs on the peer-to-peer gateway nodes (A, B, C and D), and a URI relevant center schedulingsystem runs on the center scheduling node (S) which is used for scheduling each gateway node to solve the URI correlation problem. The plurality of gateway nodes (A, B, C and D) are in a peer-to-peerrelationship, and any one gateway node can be used as a URI inquiry request gateway node to issue a URI inquiry request to the center scheduling node (S); and any one gateway node can also be used asa URI inquiry response gateway node so as to process the URI inquiry request, search a local URI hash table and return a relevant URI to the center scheduling node (S). In the method, inquiry requestinformation is collected through the center scheduling node (S) and the inquiry request information is regularly spread to other nodes in bulk, thereby improving the inquiry efficiency of the URI, and reducing the logic complexity of strategy implementation of the gateway nodes.