The debris flow should be managed with the principle that takesprevention as the major point and combines with renovation as otherengineering disaster is done. To ensure the development of mountainoustown and industry as well as the safty of railway, road and shipping,on performing the study of distribution mechanism, causes and nature ofdebris flow, it is suggested that while conducting engineering renovation(hard control) the study on soft control be paid special attention,that is,to research forecasting and warning system to inspect, to establish thewarning and disaster prevention system suitable to this department ordistrict, to set up laws and regulation, to bring the power of flood preven-tion branch into full play, social organization and individual person in or-der to keep the debris flow harm within limit and decrease the disasterloss to the least level through various kind of propagating intermediumand population of disaster prevention practices.