A method for processing local calls, the method comprising: a core network sending indication information to an access network for indicating the access network to send call voice data to the core network when using a local switching function; the access network performing a local switching after receiving the indication information, and sending the call voice data to the core network; and the core network receiving the call voice data sent by the access network, and sending mute frames to the access network; wherein the method is characterized in that: the core network comprises a Mobile Switching Center and a Media Gateway, and the step of the core network sending indication information to the access network comprises: the MSC sending the indication information when determining that the local switching is allowed to be utilized for established calls and needing the call voice data; the step of the core network receiving the call voice data sent by the access network and sending the mute frame to the access network comprises: the MGW receiving the call voice data and sending the mute frame; the access network comprises a Base Station Subsystem, and the step of the access network performing the local switching after receiving the indication information and sending the call voice data to the core network comprises: the BSS receiving the indication information and performing the local switching, and sending the voice data to the MGW; the method further comprises: after the BSS uses the local switching function, the BSS receiving and discarding the mute frame sent by the MGW. a core network sending indication information to an access network for indicating the access network to send call voice data to the core network when using a local switching function; the access network performing a local switching after receiving the indication information, and sending the call voice data to the core network; and the core network receiving the call voice data sent by the access network, and sending mute frames to the access network; wherein the method is characterized in that: the core network comprises a Mobile Switching Center and a Media Gateway, and the step of the core network sending indication information to the access network comprises: the MSC sending the indication information when determining that the local switching is allowed to be utilized for established calls and needing the call voice data; the step of the core network receiving the call voice data sent by the access network and sending the mute frame to the access network comprises: the MGW receiving the call voice data and sending the mute frame; the access network comprises a Base Station Subsystem, and the step of the access network performing the local switching after receiving the indication information and sending the call voice data to the core network comprises: the BSS receiving the indication information and performing the local switching, and sending the voice data to the MGW; the method further comprises: after the BSS uses the local switching function, the BSS receiving and discarding the mute frame sent by the MGW. the core network comprises a Mobile Switching Center and a Media Gateway, and the step of the core network sending indication information to the access network comprises: the MSC sending the indication information when determining that the local switching is allowed to be utilized for established calls and needing the call voice data; the step of the core network receiving the call voice data sent by the access network and sending the mute frame to the access network comprises: the MGW receiving the call voice data and sending the mute frame; the access network comprises a Base Station Subsystem, and the step of the access network performing the local switching after receiving the indication information and sending the call voice data to the core network comprises: the BSS receiving the indication information and performing the local switching, and sending the voice data to the MGW; the method further comprises: after the BSS uses the local switching function, the BSS receiving and discarding the mute frame sent by the MGW.