Method for user information correlation of XDR (external data representation) data of interfaces of core network

The invention discloses a method for user information correlation of XDR (external data representation) data of interfaces of a core network. Network element data receiving servers, a sequencing server, a correlation server and user information distribution servers are arranged, wherein the network element data receiving servers receive XDR data of all kinds of interfaces of corresponding network elements respectively and inquire user information; if the user information is not inquired, the received data is subjected to extraction and integration and then sent to the sequencing server; the sequencing server performs sequencing according to sending time of information carried by the data; the correlation server performs user correlation according to the information, establishes or updates a user correlation table, inquires the user information from newly received information of the interfaces and establishes backfilling data information; the network element data receiving servers distribute XDR data carrying user information to the user information distribution servers; and the user information distribution servers receive the XDR data carrying the user information and distribute the XDR data carrying the user information according to users. By means of the method, data support is provided for follow-up data analysis according to the users.