In order to explore the effect of tip skew coupled rake on the hydrodynamic performance of Kappel propellers, the fourth-order B-spline method was used to design and change the radial distribution of Kappel propellers in the skew and rake, and the 8-type propeller was constructed. The SST k-ω+γ transition turbulence model was used to simulate and the Kap509 propeller was used to verify the accuracy of the simulation, and the propeller open-water efficiency calculated by CFD was 1.06%~2.50% lower than that of EFD results. It is found that in the vicinity of J=0.8, except for the conventional end plate propellers, the efficiency of Kap01 series propellers corresponds to exceed the efficiency of Kap02 series propellers, with an average increase of 3%, among which the situation is most prominent when the skew is 24°, and the efficiency increase is 4.78%. The propeller efficiency increases with the increase of skew when J=0.9~1.0. Under the premise of low rake radial distribution, the skew of the propeller can be appropriately improved, which can strengthen the end plate effect of the Kappel propeller, thereby improving the propulsion performance of the Kappel propeller.