A synchronization method, comprising: receiving, by a base station through Remote Radio Unit, RRU, channels, a Sounding Reference Signal, SRS, transmitted by a terminal; calculating, by the base station, a receiving power of the SRS received through each of the RRU channels; selecting, by the base station, an RRU channel corresponding to a highest receiving power of the SRS; characterized in that, the method further comprises: determining, by the base station, whether the RRU channel corresponding to the highest receiving power of the SRS is the same as an RRU channel for demodulation; determining, by the base station, whether a count of a counter corresponding to the RRU channel corresponding to the highest receiving power of the SRS is above a preset threshold, when the RRU channel corresponding to the highest receiving power of the SRS is determined to be different from the RRU channel for demodulation; using, by the base station, the RRU channel corresponding to the highest receiving power of the SRS as the RRU channel for demodulation, calculating, by the base station, a Timing Advance, TA, value according to a pilot signal of a Physical Uplink Shared Channel, PUSCH, and the SRS, and transmitting, by the base station, a TA command word to the terminal according to the TA value to be synchronized with the terminal, when the count is determined to be above the preset threshold; wherein a count of a counter corresponding to an RRU channel represents the number of consecutive times that the RRU channel is determined to be corresponding to a highest receiving power of the SRS. receiving, by a base station through Remote Radio Unit, RRU, channels, a Sounding Reference Signal, SRS, transmitted by a terminal; calculating, by the base station, a receiving power of the SRS received through each of the RRU channels; selecting, by the base station, an RRU channel corresponding to a highest receiving power of the SRS; characterized in that, the method further comprises: determining, by the base station, whether the RRU channel corresponding to the highest receiving power of the SRS is the same as an RRU channel for demodulation; determining, by the base station, whether a count of a counter corresponding to the RRU channel corresponding to the highest receiving power of the SRS is above a preset threshold, when the RRU channel corresponding to the highest receiving power of the SRS is determined to be different from the RRU channel for demodulation; using, by the base station, the RRU channel corresponding to the highest receiving power of the SRS as the RRU channel for demodulation, calculating, by the base station, a Timing Advance, TA, value according to a pilot signal of a Physical Uplink Shared Channel, PUSCH, and the SRS, and transmitting, by the base station, a TA command word to the terminal according to the TA value to be synchronized with the terminal, when the count is determined to be above the preset threshold; wherein a count of a counter corresponding to an RRU channel represents the number of consecutive times that the RRU channel is determined to be corresponding to a highest receiving power of the SRS. determining, by the base station, whether the RRU channel corresponding to the highest receiving power of the SRS is the same as an RRU channel for demodulation; determining, by the base station, whether a count of a counter corresponding to the RRU channel corresponding to the highest receiving power of the SRS is above a preset threshold, when the RRU channel corresponding to the highest receiving power of the SRS is determined to be different from the RRU channel for demodulation; using, by the base station, the RRU channel corresponding to the highest receiving power of the SRS as the RRU channel for demodulation, calculating, by the base station, a Timing Advance, TA, value according to a pilot signal of a Physical Uplink Shared Channel, PUSCH, and the SRS, and transmitting, by the base station, a TA command word to the terminal according to the TA value to be synchronized with the terminal, when the count is determined to be above the preset threshold; wherein a count of a counter corresponding to an RRU channel represents the number of consecutive times that the RRU channel is determined to be corresponding to a highest receiving power of the SRS.