Abstract: A new method for estimating two-dimensional(2-D) direction of arrival(DOA) in coherent signals environment is presented with two parallel linear arrays.A new covariance matrix based on the spatial smoothing method is constructed by the characteristic of the arrays,and the coherence between the signals is further solved.The computational complexity has no increase obviously compared with the spatial smoothing method,and the signal angle is estimated by using the signal direction vectors.The spectral peak searching is not needed so as to reduce the computational load greatly.The proposed method still has the advantages of high solution and little variance.Simulation indicates that the method is effective.