A new landslide occurred on July 22

2003 in FengJie

Chongqing

China. This new landslide is developed on Baiyi’an ancient landslide on which many old and new landslides exist. Because the landslide group is on the right left side of Yangtse River

once the hazard happened

it would be dangerous for not only the residents living on the slope but also the highway just through the landslide group

the docks along the river

and the normal running of the reservoir of the Three Gorges. Therefore

attention should be given to the landslides which occur possibly in the future and some measures must be taken. In this paper

the mechanism of the new landslide is analyzed after detailed surveying on the debris for the runoff and infiltration on the slope

the slope boundary

and its geological condition by drilling. Combining the analysis of the evolution of the slope boundary due to erosion by rainfall and the softening effect of the soil-rock media by infiltrated water

we conclude the main reason of the occurrence of this landslide is that the foot of the slope had been continuously eroded by the water-flow down from the up-reach during rainfall. The existence of the deep gully also provided well geological condition for continuing sliding. Though there is no life loss in the event

the distance between the resident house and west boundary of the slope is less than 10m

and some houses have been damaged with long cracks. Measures should be taken on the slope after slide to prevent larger hazard from happening

especially for the security of the local residents. A primary plan has been presented in this paper. It should note that these measures are identical with the scheme for treatment of whole Baiyi’an landslide group

which has been proposed in existed literature.