Deploying vertical linear array in deep-sea being of excellent hydrological conditions has great significance for passive localization. But existing equipment’s structural pressure resistance and deployment difficulties make the sea trial impossible. Deep-sea behaviors in the same acoustic environments with anechoic tank, which makes it’s feasible for similar experiments using shorter linear array in anechoic tank. Firstly, the setting of two crucial parameters, precision of time delay estimation and array aperture, are demonstrated to provide reference for designing vertical linear array and tank similar experiment platform. Secondly, experiment approach and the method of processing experiment data are presented. Lastly, using experiment data, this paper forecasted localization precision and effective distance performance of vertical linear array deployed in deep-sea.