Abstract: In this paper, firstly using the piecewise continuum techniquefor the structures, the coupled differential equations have been derived for the tall building frame-shear wall-thin walled member systems with stepped parameters and with some floor slab's deformations considered, subjected to horizontal loads.Secondly, using the Ordinary Differential Equation Solver, which is a program developed for solving various ODE, the displacements and internal forces of the structures have been obtained.