On July 15,1983,a rainstorm debris flow suddenly,occured on Huashan Mountain, which is one of the five most famous mountains in China After that, the high way traffic, electricnic line and telephone line was destroyed and. a large expanse of fields was coverd.In addition,sisteen tourists were killed by this disaster.Debris flows distributed widely over Huashan Mountain but there had been no previous scientific research. Therefore, great property damage and a serious disaster resulted. In this project,we systematicly studied the pattern of debris distribution from time and space, analysed the contributing factors and put forwand the menthords to protect the Huashan Mountain area.