Provided are a management method, a system and an access node for a user line, which belong to the field of communication technology. The system in embodiments of the present invention comprises: user front-end equipment, an access node and a network access server. The access node receives a line parameter sent by the user front-end equipment, which line parameter is the line parameter of a physical line connecting the user front-end equipment to the access node. The access node configures a virtual logic line corresponding to the physical line, according to the physical line between the access node and the user front-end equipment, and allocates the line parameter of the physical line to the corresponding virtual logic line. The access node sends an access control protocol for the line parameter of the virtual logic line to the network access server. The embodiments of the present invention can perform the management of a physical user line and the user service by the way of a virtual logic line. For example, an accurate positioning of the user can be achieved by means of the method of the present invention.