Abstract: Kirchhoff type plate bending problems can be solved feasibly by boundary integral equation method. The solution of the plate bending problems by direct boundary integral equation method is shown by many e-xamples which might be interested in by aeronautic and astronautic engineers. In this paper the authors used the three generalized displacement unknowns （w, , ,） with boundary element interpolation of Hermitian type, formulized in polar coordinates, This efficient procedure is in fact a modification of previous works （G. Bezine, 1978; M. Stern, 1979; and Q. H. Du, et al., 1984）. A good number of computational examples are given. They are: cantilever triangular and square plates; Square plates with central opening and eccentric opening and rectangular plates with single hole or multiholes. The computations show that more accurate results with less computational cost can be obtained as compared with previous works.