Frequency domain initial position setting method of physical stochastic access channel

The invention provides a setting method of the frequency domain initial position of the physical random accessing channel, which includes that at least one of the conditions is judged, including the total RB number which is corresponding to the configured upstream system bandwidth, the preamble format of the PRACH and the maximum SRS bandwidth; the frequency domain initial position of the PRACH is set according to the judgment result. Because the frequency domain initial position of the PRACH is reasonably set through the setting method according to the total RB number which is corresponding to the configured upstream system bandwidth, the preamble format of the PRACH and the maximum SRS bandwidth, the disturbance of the PRACH with the PUCCH and the SRS is avoided; meanwhile, the PUSCH isavoided from being divided into multiple segments so that the scheduling flexibility is improved.