Abstract: In this paper the fundamental solutions of the orthotropic thick plate involving transvere shear deformation are presented by using Hormander's method and plane wave decomposition. The boundary integral equations of the thick plates are obtained, which are adapted to arbitrary boundary condrions and plane forms. The numerical calculations of the fundamental solutions are discussed in detail. Some of numerical examples are analyzed with B.E.M.In this paper the fundamental solutions of the orthotropic thick p...