In order to accurately estimate the hydrodynamic characteristics of planing crafts,the high-speed sailing ofplaning crafts in calm water and in regular head waves was numerically simulated with multiple degrees of freedom byperforming resistance model experiments and seakeeping model experiments.In the simulation,the RANSE VOF solverwas adopted and the trimming mesh technique as well as the integral dynamic mesh method was employed.Theresults were then compared with the experimental data to verify the accuracy of the simulation.It is found that theadopted computational fluid dynamics technique helps to accurately and efficiently simulate the sailing attitude andhydrodynamic characteristics of high-speed planing crafts in calm water and in waves,and that the simulation providesa credible reference for the design of planing crafts.