Abstract: DOA estimation method base on time-delay differences is used widely in the field of passive source location because its solidity in interference circumstance.To meet the real-time demands of some location systems,a robust time-delay difference selection method is presented in this paper by analysis of DOA estimation errors.In this method,only part of time-delay differences is estimated for the measuring of DOA to reduce the computational complexity.Computer simulation results indicate that the new method has less computational cost compared with traditional method,and based on the reasonable time-delay differences the DOA estimation results are more accurate.