Abstract: A modern newly built town is found to be located on an old slide mass after the resettlement.The local government and the residents are much concerned about the stability of the town.So a detailed geological investigation has been carried out.The slide is dated as being of an age of 22 000-24 000a B P.An analysis of the sliding mechanism the canstitution and structure of the slide mass and the properties of the sliding zones brings to light that the old slide mass will be stable over a considerably long time.Moreover, a large cave system was revealed in the slide mass with on underground river which empties into the Qingjiang river forming a natural underground drainage conducive to reducing a landslide.Some countermeasures are suggested to be immediately taken to ease the anxiety of the local people to resume their normal life.