Signaling processing method and system used for switching relay node

The invention discloses a signaling processing method and a system used for switching a relay node. The method includes a relay node belonging source base station sends user control signaling identifier mapping information managed by the relay node to a target base station in which the relay node is needed to be switched; and after the relay node is switched from the source base station to the target base station, the source base station and/or the target base station process or processes the user control signaling according to the mapping information. According to the method and the system, the control signaling identifier mapping information is informed to the target base station by the source base station, a user related S1 signaling process is guaranteed to be transmitted and performed smoothly by simple identifier mapping or updating, and effects to the control signaling by switching the relay node are reduced.