In this paper, the process of water and sediment output in the slope10°and slope 20° with rainfall intensity 30 mm/h under three kinds vegetation of trees, shrubs and herb (Broussonetia papyrifera, Vitex negundo, ryegrass) were studied through artificial rainfall simulation experiment. The results showed that the runoffs of runoff processes under all three vegetation covers were increased first and then trended to be stable, while the sediment yields were increased first, decreased secondly and then trended to be stabled, which showed Broussonetia papyrifera, Vitex negundo and ryegrass all had good regulation and control ability in runoff and sediment process. In reducing the runoff and sediment yield, ryegrass had best effect, followed by Broussonetia papyrifera and Vitex negundo. In the regulation of runoff flow velocity, the overall flow rate increased first and then trended stable, and the ability in regulating the runoff rate was in order of ryegrass> Vitex negundo > Broussonetia papyrifera.