Many large-scale landslides and slide dammed lakes were formed during Haiyuan M8.5 earthquake in 1920 in Lannihe valley of Xiji county, Ningxia province. In this paper, the basic characteristics and the using situation of the slide landforms are expatiated, and the potential environment disaster caused by the landslides is analyzed also. Meanwhile how to explorate and use this landslides landform based on lacal condition, and how to mitigate the disaster are discussed.