The invention discloses a numerical simulation analysis method for carrying out numerical simulation analysis on the nonlinear characteristic of stiffness coefficient of a centering disk of a loudspeaker and belongs to the field of loudspeaker design. The method completes static analysis by establishing a geometric model of the centering disk and defining a nonlinear material module and considering the geometric nonlinearity through a finite element method and can obtain axial displacement of the centering disk under the action of different loading forces, so that a changing curve of the stiffness coefficient of the centering disk along with the axial displacement can be obtained by post-processing. By the method, the nonlinear characteristic K(x) of the centering disk can be analyzed and obtained on the initial stage of design, i.e. before a sample is not produced and manufactured, so that the centering disk is rapid and convenient to design and manufacture.