In fact, the flow over spillway has a viscosity property and high turbulence,. etc. To simulate exactly the flow over spillway, the authors must consider these quantities in numerical model. The recent development in computer software has advanced the use of computational fluid dynamics in analyzing flow over spillway or free surface flow. In this study, some turbulent models were presented, using Reynolds stresses model and finite volume method to simulate the flow over spillway with a standard WES profile. It is shown that there is a reasonable good agreement between numerical results and experimental ones.