Method and device for processing radio link failure under carrier aggregation scene

The embodiment of the invention discloses a method and a device for processing radio link failure under a carrier aggregation scene, which can ensure that user equipment (UE) can reconstruct radio resource control (RRC) connection in time. One method provided by the invention comprises the following steps of: when the radio link failure of at least one downlink carrier is detected, or the radio link failure of at least one uplink carrier is detected, or the physical layer problem of at least one carrier is detected, or the random access failure of a random access channel (RACH) of at least one carrier is detected, starting radio link normality or failure judgment of all carriers, and/or starting a first timer. The other method provided by the invention comprises the following step of: when the need of RRC connection reconstruction is judged, selecting a carrier in a service aggregation cell or selecting a low-frequency carrier in the service aggregation cell to initiate an RRC signaling connection request.