To further refine the seismic fortification category and fortification criterion of water transport engineering,this study summarizes and analyzes the relevant seismic fortification classifications and fortification criterion both in China and internationally,and focuses on the characteristics of water transport engineering and the current status of seismic design specifications to study the seismic fortification classification and fortification criterion of water transport engineering.It is suggested that the seismic fortification categories of water transport engineering should be classified as the Class I,Class II,and Class III.The projects classified as Class I in seismic fortification mainly include:structures that can cause a large number of casualties due to earthquakes,structures that can be used normally or quickly restored after earthquakes and meet special functional requirements such as earthquake relief,key structures that,if damaged,are difficult to restore,structures with severe secondary disasters,and structures whose interruption of use will cause serious economic and social impacts on the local area.The projects with seismic fortification category as Class III are mainly temporary structures and structures that are easy to repair after earthquakes，small structures and some temporary structures.Structures classified as Class II in seismic fortification are mainly general structures other than Class I and Class III.Based on the seismic fortification classification for water transport engineering,the seismic fortification criterion of water transport engineering is proposed.According to different seismic fortification classification,the corresponding seismic action and seismic measures grades are suggested