the Ming sheng gong landslide, which lies in Lishan mountain, is an old landslide. In order to study the stability of the Ming sheng gong la ndslide, the authors study in details the formation condition based on the plotinvestigation. The Ming sheng gong landslide is caused by synthetic factors, such as layers, precipitation,ground water, physiognomy , slipping belt and crannies. According to the limit balance method, the Ming sheng gong landslide is under an instability situation and has to be dealt with prompt ly.