Abstract:The verification of wave spectrum analysis program about tropical cyclone is discussed. In general, a special case that can be solved analytically is numerically solved, and then the numerical solution and the analytical solution are compared. If we guarantee the analytical solution is right, the numerical solution must be wrong if the two results are different. In this paper, the specific verification process is given for wave spectrum analysis of disturbance in tropical-cyclone-scale vortex. In addition, the eigenvalue problem of barotropic primitive equation in tropical-cyclone-scale vortex is analytically solved when the basic flow tends to zero. By comparison, we can see that there is little difference between the numerical solution and the analytical solution, and the largest relative error is less than 10%. It shows that the numerical calculation is right in this case. Here only a pair of gravity inertial waves exist. The eigenfunction of the frequency equation can be expressed by Bessel function, which is right only when the basic flow tends to zero. So in order to gain the solution in the typical flow, we have to turn to the numerical way.