In order to explore the characteristics of flow around the spur dike in Jiepai reach and clarify the relationship between the flow characteristics and the damaged dike head，this paper，under clear water and fixed bed conditions，uses the normal model to study the characteristics of flow around the spur dike in Jiepai reach of the Yangtze River and analyzes the influence of flow conditions on distributions of areas with the maximum velocity and maximum turbulence intensity from measured sections around the spur dike in Jiepai reach，especially the three-dimensional velocity data measured around dike head. The results show that the middle and lower parts of the dike are vulnerable areas from perspectives of velocity and turbulence intensity in x and z directions. As the velocity in the dike head increases，the submerged flow，dike head vortex system，and unit discharge are the main factors damaging the dike head.