Abstract: Abstract This paper proposes a design method for a dual-polarized Vivaldi antenna loaded with multi-stage lenses. Based on the phase center distribution characteristics of the dual-polarized Vivaldi antenna over a broad frequency band, the focal distribution function and the curve equation of the lens are derived. By optimizing the dynamic matching relationship between the lens focus and the antenna phase center, the gain performance is improved, and phase distortion is corrected. After loading the multi-stage lenses, the antenna achieves |S11| below -10 dB within 0.4–4.7 GHz, with a gain improvement of 0.4–5.5 dBi across the band. Additionally, the time-domain waveform tailing is significantly reduced compared to the unloaded case.