Method and device for activating configuration in LTE system

The embodiment of the invention relates to a method for activating configuration in an LTE system in the field of communication, which comprises the following steps of: constructing activation or deactivation information and carrying the activation or deactivation information in downlink physical control channel (PDCCH) signaling; and sending the PDCCH signaling to user equipment through a PDCCH so as to make the user equipment correspondingly activate or deactivate the configuration according to the activation or deactivation information in the PDCCH signaling. The embodiment of the invention also provides a device for activating the configuration. In the embodiment of the invention, the user equipment is informed to activate or deactivate the corresponding configuration through the downlink physical control channel signaling, so that a network side and the user equipment can synchronously activate/deactivate the corresponding configuration, not only uplink resources can be saved, but also uplink interference among different user equipment can be reduced.