The direction of arrival estimation, which is based on microphone arrays, has crucial strategic significance in the field of field sensor network theoretical research and engineering practice. Multi-channel microphone arrays often produce orientation errors due to the inconsistencies in the amplitude and phase of each channel when sound sources are oriented. In response to this problem, this study proposes an adaptive correction method for channel inconsistencies in a microphone array. This method constructs the objective cost function of the signal spectrum space based on the principle of subspace decomposition. Furthermore, it combines the simulated annealing algorithm model to obtain the correction matrix of the array by minimizing the cost function. Finally, the 8-element microphone array is simulated by the computer using the above method, and the 4-element microphone array is used for the actual test.The simulation and actual test results confirm the feasibility of the correction method.