A state space finite element method for 2D thermal elasticity of laminated materials was deduced by introducing stress-strain relations of thermal elastic problems. Finite element approximation was introduced for the variations of displacements and stresses on the horizontal interfaces while the through thickness distributions of the variations of displacements and stresses were obtained by utilizing state space method. The displacement and stress at the interface of laminated materials deduced by the present method were illustrated. It is shown that the present method has high calculation accuracy and low computational cost by comparing with the finite element method.