Abstract: Three-component vibroseis acquisition has been widely use in desert regions due to its operational convenience; however, the resulting records suffer from weak effective signal energy, low signal-to-noise ratio (SNR), and pronounced “black triangle” artifacts, which severely hinder the imaging and inversion of PS waves. To address this issue, an interferometric stacking prestack time migration method tailored for low-SNR PS-wave data was proposed. Based on the time–distance relationship among the source, receiver, and imaging point, a mapping relationship was established between amplitude samples in the input seismic traces and those in the target PS-wave common-image gathers. Incorporating PS scattered-wave traveltime, an interferometrically stacked seismic trace was constructed to enhance phase-consistent energy while suppressing noise. Furthermore, the influence of the initial velocity model on the interferometric PS-wave gathers was analyzed theoretically. Tests on synthetic and field data demonstrated that the proposed method shows low dependence on the initial velocity model, delivers high-quality PS-wave common-image gathers under low-SNR conditions, and significantly improves PS-wave migration accuracy, thereby providing effective support for elastic wave exploration in desert regions.