Abstract: Department of Modern Mechanics, Based on thermo electro elastic coupled differential equations, composite laminates with anisotropic piezo thermo elastic layers under cylindrical bending are analyzed via Fourier series method. Because no simplification is adopted, the method can be used to analyze thin and thick plates exactly. By using complex exponents, the deduction and programming are simplified greatly. In the paper, all possible models for the heat, electric and mechanical boundaries are taken into account. Furthermore, the interactions between the coupled components and their individual characteristics are analyzed, and a marked difference between the structural response under electric load and thermo load is found.