Four representative models on viscous debris flow are introduced,including Bagnold′s model,Takahashi′s model,Fei′s model and Iverson′s model.Contrast tests for the four models are made using thedata observed from 23debris-flow surges in Jiangjiagou,Dongchuan City,Yunnan Province.The mean valueof velocities simulated by Bagnold′s model approximates to that of observations and however,simulated dispersion stress is not strong enough to sustain effective gravity of the solid phase.Simulated velocity byTakahashi′s model is less than observations.Hydraulic gradient can be simulated by Fei′s model,which isalso less than observations.Primary analysis with Iverson′s model shows that the liquefaction degree computed by stress balance equation can be achieved in Jiangjiagou watershed.Analysis of the sensitivity of each modelto some parameters indicates that Bagnold′s model and Takahashi′s model are sensitive to the maximum possibleconcentration,while Fei′s model and Iverson′s model are sensitive to the internal friction angle.