Disorderly sand excavation activities in the river caused damages to the channel condition.It is essential to reduce the effects of sand excavation on the channel condition by regulating the way of sand excavation and protecting channel condition.Focusing on a sand excavation area of Manting Dashaba,and using average depth of two-dimensional finite element mathematical model,we optimize the original excavation scheme.In addition,some channel protection measures such as building beach protection engineering before excavation,controlling excavation elevation and adjusting excavation area are given.