In this paper a high resolution direction finding algorithm which is suitable for deform circular array （UCA）is presented. The algorithm is constructed by transforming the UCA from element space to modespace and reformulating the criteria function of maximum likelihood method（MLM）to a simple form by introducigthe concept of noise manifold matrix. Commpd with MLM the new method of this paper is only an analysis algohthln acher than a multiple-valtiple optimizing one which often becomes useless due to heavy computational burden and local minimum traps.