Soil erosion on the Loess Plateau mainly occurs from June to September during which high intensityrainfall occurs correspondingly

which always leads to severe damages to slope surface and even causes landslides.In this study

an indoor model of bare slope was established and the artificial rainfall device was set upover the slope.The changes of slope shape were observed and the effects of water infiltration on the loesslandslides were analyzed through comprehensive monitoring.Results show that:(1)the water infiltrationrate was low and the ratio of runoff to infiltration first increased and then dropped to a steady level with theincreased time.Water infiltration rate at slope top was always greater than that on the slope surface.(2)After tensile cracks were generated at slope top

small vertical cracks were created locally inside theslope.The displacement directions were vertical below the slope top and slightly greater than 45°on the lowslope section.(3)Eerosion on the slope experienced the process of"sheer erosion-gully erosion-deep andlateral erosion in the slope of ditch"

and ultimately the gully bank collapsed.The whole slope moved downwardsdue to the erosion on the slope surface.(4)The landslide developed from the toe of the slope to the top.