本文运用弹塑性有限元分析了扩底桩的荷载传递特性，并通过对其应力场和位移场的分析，指出扩底桩桩底土的竖向应力和竖向位移向桩底集中且收敛快，影响范围小，有效压缩层薄等特点，从而为在有良好浅埋持力层的软土地区应用扩度桩提供了一定的理论依据。 In this paper, elastic-plastic finite element analysis is used to analyze the load transfer characteristics of the bottom-expanded pile. Through analysis of its stress field and displacement field, it is pointed out that the vertical stress and vertical displacement of the pile bottom soil are concentrated and converge quickly. The scope of impact is small and the layer is effectively thinned. This provides a theoretical basis for applying dilating piles to soft soil areas with a good shallow bearing layer.