The types of debris flows of Ganluo county in great part belong to thedebris flow of storm, it could be divided into gullytyped and slopetypeddebris according to the conditions, the stonedebris and the muddebrisaccording to the composing matter, and the thin, the silt and the interimdebris according to the characters of the flowing.The preventive measuressuggested are to construct checkdam for partial harness, to avoid debrisflow and to drege channels, consolidate engineerings and raise the saftycoefficients.