A method for synchronization between base stations, comprising: receiving, by a primary radio frequency integrated circuit, RFIC, of a slave base station, a cell reference signal, CRS, sent by a master base station, on a specific symbol in a special subframe; and performing, by the slave base station, synchronization between the slave base station and the master base station according to the received CRS; characterized in that, the slave base station selects a neighboring base station with a consistent special subframe ratio as the master base station, a symbol ratio of downlink pilot time slot symbol, DwPTS, symbols, guard period, GP, symbols, and uplink pilot, UpPTS, symbols in the special subframe is 9: 4: 1, and the specific symbol is a symbol 4 or a symbol 7 in the special subframe; before said receiving, by the primary RFIC of the slave base station, the CRS sent by the master base station, on the specific symbol in the special subframe, the method further comprises: switching, by the slave base station, from a transmitting state to a receiving state within a first duration before a start point of the specific symbol; and after said performing, by the slave base station, synchronization between the slave base station and the master base station according to the received CRS, the method further comprises: switching, by the slave base station, from the receiving state to the transmitting state within a second duration after an end point of the specific symbol; wherein the first duration and the second duration are smaller than a duration occupied by a cyclic prefix, CP, used when the slave base station transmits a downlink data signal on each symbol. receiving, by a primary radio frequency integrated circuit, RFIC, of a slave base station, a cell reference signal, CRS, sent by a master base station, on a specific symbol in a special subframe; and performing, by the slave base station, synchronization between the slave base station and the master base station according to the received CRS; characterized in that, the slave base station selects a neighboring base station with a consistent special subframe ratio as the master base station, a symbol ratio of downlink pilot time slot symbol, DwPTS, symbols, guard period, GP, symbols, and uplink pilot, UpPTS, symbols in the special subframe is 9: 4: 1, and the specific symbol is a symbol 4 or a symbol 7 in the special subframe; before said receiving, by the primary RFIC of the slave base station, the CRS sent by the master base station, on the specific symbol in the special subframe, the method further comprises: switching, by the slave base station, from a transmitting state to a receiving state within a first duration before a start point of the specific symbol; and after said performing, by the slave base station, synchronization between the slave base station and the master base station according to the received CRS, the method further comprises: switching, by the slave base station, from the receiving state to the transmitting state within a second duration after an end point of the specific symbol; wherein the first duration and the second duration are smaller than a duration occupied by a cyclic prefix, CP, used when the slave base station transmits a downlink data signal on each symbol. switching, by the slave base station, from a transmitting state to a receiving state within a first duration before a start point of the specific symbol; and after said performing, by the slave base station, synchronization between the slave base station and the master base station according to the received CRS, the method further comprises: switching, by the slave base station, from the receiving state to the transmitting state within a second duration after an end point of the specific symbol; wherein the first duration and the second duration are smaller than a duration occupied by a cyclic prefix, CP, used when the slave base station transmits a downlink data signal on each symbol. switching, by the slave base station, from the receiving state to the transmitting state within a second duration after an end point of the specific symbol; wherein the first duration and the second duration are smaller than a duration occupied by a cyclic prefix, CP, used when the slave base station transmits a downlink data signal on each symbol.