In many special filtering system, the direction of arrival(DOA) should be evaluated for the received signal. MUSIC algorithms is a classic one and is applied widely, but its computing load is very large because there exist many transforms of matrix. As the number of uniform circle is, the data are cyclic in the searching of peak in MUSIC algorithm for 2-D evaluation of DOA. The authors discuss how to use DFT to reduce the computation load. At the same time, the simulation of performance shows that the proposed algorithm improves the efficiency by fifty percent, that is important for the project reality.