Abstract: Henan Province lies in the central plains and in the transition zone between second-and three-order geomorphologic ladder,where the disaster of debris flow often happens,which has caused a large loss of life and property.Under the comprehensive influence of geology,landform,hydrology,meteorology,agrology,and vegetation,the debris flow is a result of environmental deterioration in geology and ecology.The article firstly introduces the status quo of debris flows in Henan Province,analyzes their characteristic...