Abstract: By using a high-precision 2D numerical wave tank established based on the open source solver non-hydrostatic wave model NHWAVE, the law of the influence of emergent rigid vegetation patch on run-up process of focused waves is systematically studied and the affections of the factors such as effective wave height, peak wave period and the rigid vegetation density and length on attenuation coefficient of local maximum wave height, dissipation coefficient of total wave energy and run-up height of maximum waves are also analyzed. The results show that when the focused waves spread towards the shore, the attenuation coefficient of local maximum wave height and the dissipation coefficient of total wave energy are both increased with the effective wave height and the rigid vegetation density and length, but decreased with the increase of the peak wave period. The maximum run-up height of the focused waves is increased with the effective wave height and the peak wave period, but decreased with the increase of the rigid vegetation density and length. With the increasing of the rigid vegetation density and length, the crest-focused waves have a larger maximum run-up height than the trough-focused waves. These results can provide references for further understanding of the attenuation effect of coastal wave prevention forest on focused waves and the constructions of disaster prevention and mitigation in the coastal areas.