The distribution of soil saturated hydraulic conductivity (K_s) and its influencing factors under typical vegetation types can provide a powerful reference for vegetation construction in Beijing mountainous area and deepen the understanding of soil water movement. In this study, four typical vegetation types in Beijing mountainous area were selected, and soil physical and chemical properties,root biomass and gravel volume were investigated. Based on Pearson correlation analysis, multiple stepwise regression analysis and path analysis,the distribution of soil saturated hydraulic conductivity and its influencing factors were obtained. The results showed that: (1) The soil saturated hydraulic conductivity ranged from 0.05 mm/min to 2.23 mm/min, which belonged to the height variation and decreased with the soil layer downward. The soil saturated hydraulic conductivity of the mixed forest of Platycladus Orientalis and Shrub, pure forest of Platycladus Orientalis and mixed forest of Platycladus Orientalis and Acer elegantulum were significantly different (p＜0.05). The relationship between soil saturated hydraulic conductivity and depth was in accordance with logarithmic function y=±aln x+b, R²≥0.858. (2) Correlation analysis showed that soil saturated hydraulic conductivity was significantly correlated with bulk density, total porosity, capillary porosity, root biomass and organic matter content (p＜0.01), there was significant correlation with non-capillary porosity and natural water content (p＜0.05). (3) Stepwise regression analysis showed Y=3.42X₂+0.78X₆-1.333, R²=0.862. Further path analysis showed that root biomass mainly affected soil saturated hydraulic conductivity directly, while total porosity affected soil saturated hydraulic conductivity indirectly. And as it turns out, the mixed forest of Platycladus Orientalis and shrub has the best water conductivity, and the latter vegetation construction should focus on the mixed forest of Platycladus Orientalis and shrub in order to reduce runoff and conserve water sources.