Abstract: In processing of array signal, Direction Of Arrival(DOA) of target can be ob-tained by extracting spatial frequency of echo. This article mainly proposes a new method of beam-forming using continuous wavelet transform. It is based on the traditional beam-forming method with STFT. In the paper, the theory frames and the simulation results are given. Prom the results it can be concluded that, the method based on WT is more effective than that on STPT. This effect is determined by the advantages of wavelet transform in time-frequency analysis.