When studying incident wave propagation into a harbor basin with several entrances where the water depth is non-uniform,the traditional one-line wave generation method cannot satisfy the incident wave conditions at all entrances,which will cause obvious errors.In numerical models,a multi-line wave generation method is applied to solve the problem.In physical models,the multi-line generation method cannot be used until the wave generation line can be divided into several parts at any position and each part can be controlled individually.But the division is so difficult and expensive.In this paper,a new method named multi-model superposition is developed which is based on one-line wave generation method for one-entrance harbor basin.Wave generator upgrading is unnecessary when this method is applied.The reliability of the method is verified by a real case.