Abstract: This paper describes the method of direction of arrival(DOA) estimation for many groups of coherent and uncorrelated sources under mutual couple based on Toeplitz matrix.The method first estimates the mutual couple parameter of the linear array,and compensates the array date using the mutual couple parameter.Then,the method decoherences the coherent sources by using Toeplitz matrix.Finally,the DOA of each source is estimated by using the MUSIC method.Experimental results show that the algorithm is effective in solving the influence of mutual coupling,avoiding the loss of array,and realizing the accurate estimation of small sources.