本文提出了我国泥石流灾害南方及西北部分地区以沟谷型、北方以河谷型为主的区域分布总体格局的认识， 并对比沟谷型泥石流； 分析论述了河谷型泥石流成灾影响范围、成灾特点、流体结构及运动特征、土石形成机制和供给作用方式以及认定、预报和防治工程等方面的特点 This paper presents the understanding of the overall pattern of valley distribution in the southern and northwestern parts of China and the valley-based debris flow in the north of China, and compares the valley-type debris flow; analyzes the disaster-affected area, Fluid structure and movement characteristics, the mechanism of formation and supply of rock and soil and the way of identification, prediction and control engineering