The invention relates to a transmission method of an uplink control channel in a TDMA (Time Division Multiple Address, system. The transmission method of the uplink control channel in the TDMA system comprises the following steps of 1, performing differential m-ary phase shift keying (D-MPSK) modulation on signaling data and simultaneously coding modulated D-MPSK signs repeatedly; 2, calculating subcarriers corresponding to a self ID (Identification) of a UE (User), mapping the resultant modulated signs on the corresponding subcarriers, and performing constellation scrambling treatment, inverse fast Fourier transformation and cyclic prefix addition on data of the subcarriers by the UE to obtain an OFDMA (Orthogonal Frequency Division Multiplex) signal; 3, after the implementation of lowpass filtering, digital-to-analogue conversion and uplink frequency conversion on the signal in order, sending the OFDMA signal into a signal channel to reach an AP (Access Point) within a specified time slice; and 4, repeating operations from the step 1 to the step 3 by other UEs, sending the OFDMA signals into the channels within the same time slice, and completing the concurrent sending of the control channels of all the UEs. With the adoption of the transmission method provided by the invention, the requirement of an AP receiving machine on the time and frequency synchronization precision of the OFDMA signal can be lowered greatly, and the realization complexity is lowered as well.