Disclosed are a method for processing a CDN service for reducing a domain name parsing time and improving parsing efficiency. The method in the embodiments of the present invention comprises: a first DNS receiving a domain name parsing request of an LDNS of a target area, wherein the domain name parsing request is sent by the LDNS according to the IP address of the first DNS, and the IP address of the first DNS is obtained after an authoritative DNS of a registry queries NS records and is sent to the LDNS, the NS records being used for indicating a first DNS having the right to parse a target domain name, and the first DNS belonging to a first content delivery network (CDN) service provider; the first DNS querying domain name parsing records according to the target domain name so as to obtain the IP address of a first Web server in the target area; and the first DNS sending the IP address of the first Web server to the LDNS. Also provided is an authoritative domain name parsing server, a domain name parsing server and a communication system.