The wave flume can be simulated wave generation,propagation,and interaction with structures,providing intuitive and reliable data support.With the rapid development of computer technology and numerical methods,three-dimensional numerical wave flume gradually becomes a research hotspot in the field of port engineering.In this paper,the three-dimensional numerical wave flume is generated by using the numerical simulation software FLUENT,and the coupling model of three-dimensional finite element and finite volume element is built by combining ANSYS-FSI module,which can accurately simulate the whole process of wave acting on the mounted breakwater and other structures.To verify the accuracy of the numerical model,the stability of the top crown wall of the mounted breakwater under the action of waves is taken as an example,and the results of the numerical model are compared with those of the theoretical formula.The results show that the results of the numerical model and the theoretical formula are basically consistent,which proves that the three-dimensional numerical wave flume model is reliable.In practical engineering application,the numerical wave flume can be used for scheme comparison to improve work efficiency,and combined with physical model test to provide strong support for the design and construction of port engineering.