To evaluate the differences of tidal bore generation by existing methods and propose the solution strategies such as mesh size and turbulent model, a series of numerical tests were carried out with the CFD method. The tide bores were generated by discharge method and boundary method, respectively, and by comparing the hydrodynamic characteristics, the influences of mesh size and turbulent model on the tide simulation precision were investigated. The results show that under the condition of the same boundary flow discharge, the tidal bores generated respectively by discharge method and boundary method have almost the same water surface variations, velocity distributions and velocities of bore propagation. Besides, the influence of mesh size on simulation results is weak when the mesh size is not larger than 0.100H(tidal bore height). Compared with the standard k-εmodel, RNG k-εmodel is more suitable for modelling the tidal bore.