Please translate it in English Of the CFD numerical simulation method in this paper, the finite element thought alone international level 470 sailing stability to the plate are studied. The SST K - omega turbulence model to simulate the steady level 470 to different side plate full scale and different scales, the numerical simulation of the hydrodynamic performance of different Angle of attack. Based on the international level 470 unsteady viscous flow field numerical simulation to the plate, different scales, different side, stability under different Angle of attack, and the location of the centroid to the plate change rule. Through the analysis of the application of law of stability to the plate in sailing athletes in sailing quantitative control and stability to the board to provide theoretical references for the control of, study lay a foundation for optimization design of subsequent stability to the board.