In order to scientifically evaluate the marine risks caused by the landslide disaster and scientifically implement water traffic control decision,the three-dimensional measure method of the maritime risks of landslides is studied.With large and medium scale motion type landslide surge as the research object,according to formation process of landslides maritime risk,three-dimensional measurement method is studied.The landslide deformation failure stage,scale of landslide surge,surge of damaged ship system risk comprehensive coefficient to measure the maritime risk evaluation model is put forward.The example illustrates the application of this method and risk evaluation model.Research results indicate that the maritime risk measure methods and evaluation model,considering the main factors of the landslide danger water traffic control,fully reflect the maritime risk characteristics caused by landslide.