Abstract: Due to the complexity of debris flow dynamic process,difficulties exist on the study of its constitutive model and dynamics simulation.This review begins with a survey of a number of literatures on constitutivemodelsand numerical simulation of debris flow process.Next,some important aspects are discussed.They included :(1) principle of existing constitutive models for debris flow and their applicability;(2) implement of numerical models and their application;(3) effect of environmental factors on debris flow dynamicprocess, such as stress redistribution and propagationas a result of complex geomorphological and geohydrological conditions.Finally,the potential practicability of GIS simulation for debris flow simulationis discussed.