A method for sharing the total LTE carrier bandwidth between a Global System for Mobile Communications GSM system and a Long Time Evolution LTE system, the method comprising: for fixed channels of the LTE system, allocating carrier frequencies of the GSM system to a current cell and a neighbour cell interfering with the current cell, wherein the carrier frequencies of the GSM system and fixed channels of the LTE system are not located on same frequency resources to avoid interfering with fixed channels of the LTE system, wherein the fixed channels of the LTE system comprises at least one of the following channels: Physical Broadcast Channels -PBCHs-, Primary Synchronization Channels -PSCHs-, Secondary Synchronization Channels -SSCHs-, Physical Downlink Share Channels -PDSCHs- at which Main Information Blocks -MIBs- are located, Physical Uplink Control Channels -PUCCHs-, and Physical Random Access Channels -PRACHs-; for frequency domain resources allocated to users and indicated by Physical Downlink Share Channels -PDSCHs- and Physical Uplink Share Channels -PUSCHs- of the LTE system, allocating the frequency domain resources of the LTE system to the users which are not on same frequency resources with frequency locations of the carrier frequencies of the GSM system allocated to the current cell and the neighbour cell interfering with the current cell, so as to avoid interfering with the users of the LTE system; for Physical Control Format Indicator Channels -PCFICHs- and Physical Hybrid ARQ Indicator Channels -PHICHs- of the LTE system, allocating carrier frequencies of the GSM system to the current cell and the neighbour cell interfering with the current cell, wherein the carrier frequencies of the GSM system are not located on same frequency resources with PCFICHs and PHICHs of the LTE system so as to avoid interfering with the PCFICHs and the PHICHs of the LTE system; or allocating, by the LTE system, an appropriate Cell Identification -CellID- to avoid the carrier frequencies of the GSM system of the current cell and the neighbour cell interfering with the current cell; for Physical Downlink Control Channels PDCCHs of the LTE system, determining whether the frequency resources occupied by the PDCCHs are overlapped with frequency resources occupied by the GSM system of the current cell and the neighbour cell interfering with the current cell, and, according to the degree of overlap, increasing, by the LTE system, PDCCH resources to make up the PDCCH which has been interfered, or scheduling, by the LTE system, appropriate PDCCH resources to avoid interference; and keeping appropriate guard bands when avoiding interference. for fixed channels of the LTE system, allocating carrier frequencies of the GSM system to a current cell and a neighbour cell interfering with the current cell, wherein the carrier frequencies of the GSM system and fixed channels of the LTE system are not located on same frequency resources to avoid interfering with fixed channels of the LTE system, wherein the fixed channels of the LTE system comprises at least one of the following channels: Physical Broadcast Channels -PBCHs-, Primary Synchronization Channels -PSCHs-, Secondary Synchronization Channels -SSCHs-, Physical Downlink Share Channels -PDSCHs- at which Main Information Blocks -MIBs- are located, Physical Uplink Control Channels -PUCCHs-, and Physical Random Access Channels -PRACHs-; for frequency domain resources allocated to users and indicated by Physical Downlink Share Channels -PDSCHs- and Physical Uplink Share Channels -PUSCHs- of the LTE system, allocating the frequency domain resources of the LTE system to the users which are not on same frequency resources with frequency locations of the carrier frequencies of the GSM system allocated to the current cell and the neighbour cell interfering with the current cell, so as to avoid interfering with the users of the LTE system; for Physical Control Format Indicator Channels -PCFICHs- and Physical Hybrid ARQ Indicator Channels -PHICHs- of the LTE system, allocating carrier frequencies of the GSM system to the current cell and the neighbour cell interfering with the current cell, wherein the carrier frequencies of the GSM system are not located on same frequency resources with PCFICHs and PHICHs of the LTE system so as to avoid interfering with the PCFICHs and the PHICHs of the LTE system; or allocating, by the LTE system, an appropriate Cell Identification -CellID- to avoid the carrier frequencies of the GSM system of the current cell and the neighbour cell interfering with the current cell; for Physical Downlink Control Channels PDCCHs of the LTE system, determining whether the frequency resources occupied by the PDCCHs are overlapped with frequency resources occupied by the GSM system of the current cell and the neighbour cell interfering with the current cell, and, according to the degree of overlap, increasing, by the LTE system, PDCCH resources to make up the PDCCH which has been interfered, or scheduling, by the LTE system, appropriate PDCCH resources to avoid interference; and keeping appropriate guard bands when avoiding interference.