Through the water discharge scour test in field simple runoff plot, soil and water conservation benefits of different vegetation types in the riparian of Beijing mountain area were explored. 3 kinds of flow discharge and 6 different vegetation types were designed, and the test lasted 31 min. Runoff and sediment samples during the experiment were cllocted to analyze the characteristics of runoff and sediment production in different runoff plots. The results showed that: (1) The average total amount of runoff and sediment (43.29 L/m²,0.71 kg/m²) were significantly lower than those on the bare slope (65.86 L/m², 3.21 kg/m²) (p < 0.05). Vegetation was benificial for reduction runoff and sediment production, and the benefits of sediment reduction (78.66%) were significantly greater than runoff reduction (36.16%); (2) Soil and water conservation benefits were significant difference among different vegetation types. Specificially, the average flow rate (6.16 L/min) and the average sediment production rate (55.50 g/min) of bermudagrass slope was the smallest among different vegetation slopes, and the benefits of soil and water conservation was the best.(3) Stable infiltration rates were significantly difference among different vegetation types (p < 0.05), both were larger than the stable infiltration rate under bare slope conditions. Among them, the stable infiltration rate of bermudagrass was the highest (129.0 mm/h). In summary, vegetation had obvious soil and water conservation benefits, and there were significant differences among different vegetation types. The results provide a theoretical basis for the construction of ecological environment and the ecological restoration of riparian in Beijing mountain area, and also provide a reference for species selection for vegetation restoration.