A new method for estimating directions-of-arrival（DoA） of multiple spatial narrowband signals whose carrier frequency unknown is presented to lighten computational complexity of classical 2 dimension searching method.The steering vector of the array can be modeled as the product of a matrix containing the azimuth factor and a vector containing the frequency factor.Factor of frequency is removed from the spatial function of MUSIC method through matrix transfer.DoA of targets is got through one dimension searching using transferred MUSIC spatial function.Since the method provides multiple targets’ azimuth estimation via one dimension searching

the complexity computation of method is less compare with that of classical MUSIC method.Simulation results show that RMSE of RMUSIC is about 0.3° in high SNR.This method is feasible in engineering practice.