Aiming at the ubiquity of coherent sources in real circumstances, an ordinal algorithm to direction of arrival (DOA) estimation for symmetric uniform linear array is presented. under the condition of colored noise field.The algorithm combined with spatial differencing and Toeplitz reconstructing is used to cope with the situation where both uncorrelated sources and coherent sources exist, The uncorrelated sources is first estimated by using MUSIC, simultaneously the noise covariance matrix and uncorrelated sources are eliminated, Then a Toeplitz matrix is constructed for the remained coherent sources to renew full rank. After preprocessing, propagator method (PM) is employed to find the DOAs without any eigen decomposition. By using this approach, the number of sources resolved exceeds that of array elements and at the same time the computational complexity is obviously reduced. Simulation results show that the proposed method is effective and correct.