On the basis of previous study about spur dike and hydraulic flashboard, the paper combined permeable spur dike with hydraulic flashboard technology to form a new revetment structure of hydraulic flashboard and permeable spur for the first time.Through the use of computational fluid dynamics software,it carried out the numerical simulation on the hydraulic characteristics of hydraulic flapper permeable spur dike and entity dike, permeable spur dike of well piling .The results showed that 1) through the action of water and sediment regulation, hydraulic flashboard permeable spur in the two fields of self protection and embankment protection is superior than hydraulic flashboard entity spur dike; 2) hydraulic flashboard permeable spur dike is superior than well columnar permeable groin in reducing flow velocity, promoting sedimentation , protecting dike and shore areas.