A numerical model was developed to simulate flow around non-submeged groyne in two dimensions, which was based on N-S equations with Smagorinsky’s subgrid-scale turbulence model. Flow phenomenon and results measured practically agree with the calculation results very well, and this model could be used to simulate the characteristics of the eddies of upper and down reaches around spur-dikes successfully. A numerical model was developed to simulate flow around non-submeged groyne in two dimensions, which was based on NS equations with Smagorinsky’s subgrid-scale turbulence model. Flow phenomenon and results measured practically agree with the calculation results very well, and this model could be used to simulate the characteristics of the eddies of upper and down reaching around spur-dikes successfully.