Abstract: In order to study the analytic solution of four sides elastic-supported rectangular thin plate,the analytic solution expression of various boundary conditions of rectangle thin plate is written out through principle of superposition.With the displacement and rotation compatible analysis of edge beam and rectangle thin plate,the analytic solution has been obtained.Through altering the value of EI and GI_t,the solution of rectangle thin plate with various boundary conditions in the loading condition of any local even force could be obtained.And at last the accuracy of computational results is demonstrated.

Key words: rectangle thin plate； general displacement； boundary condition； analytic solution；