In this paper，the spline finite point methods is proposed to solve the problem of geometric nonlinear dynamic response of plates. Taking the form of the product of the cubic spline function and the mode shape function of beam，as trial function and starting from virtual displacement principle，the exact and explicit expression of nonlinear stiffness matrix is derived and the dynamic incremental equations are solved by means of wilson-θ method. The computational examples are given in this paper. Compared to the achievements known，the method in it has following advantages: it leads to smaller amount of computational work，and 1t has higher accuracy. So the spline finite point method is more effective in analyring nonlinear dynamic response of plates.