The influence of the antenna array on the space-time anti-jamming performance of Beidou navigation is discussed. The research is based on the same adaptive anti-jamming algorithm, and a square array with four elements, a cross-shaped array, and a Y-shaped array are selected for comparative analysis. Computer simulations provide the antenna array patterns of different array configurations under the modes of no interference, single interference, double interference, and triple interference. Moreover, a comparative analysis of the advantages and disadvantages of each array configuration is carried out, which has certain reference significance for the design of Beidou anti-jamming antennas.