In the research of DOA estimation of coherent signals from logarithmic spiral arrays, this paper proposes a VA-MMUSIC algorithm that virtualizes the logarithmic spiral array into a uniform line array, derives the covariance matrix of the virtualized array, then applies the covariance matrix to the MMUSIC algorithm to perform DOA estimation of coherent signals. Simulation results show that the VA-MMUSIC algorithm, is able to achieve DOA estimation of coherent signals, and at a signal-to-noise ratio of 10 dB and signal intervals within 5°, the VA-MMUSIC algorithm is still able to accurately estimate the azimuth of the coherent signal source, with errors always remaining within 0. 5°, verifying the effectiveness of this method. The effectiveness of the VA-MMUSIC algorithm in a practical environment is also verified by using a logarithmic spiral array to receive coherent signal source data under real experimental conditions.