Abstract: With the homogeneous solution to the equilibrium equation for steel-concretecomposite beams taken as the displacement function of the beam element withsteel, concrete and elastic intermediate layer integrated together, theelement stiffness matrix and equivalent node loads are obtained, without thehypothesis that the slip of the two ends of the element is zero. Aneffective and powerful tool is offered foranalyzing the complicated structure of composite beams.