To some extent, the research level and application level of composite material reflect the science and technology developing level of a country. A novel optimized model is proposed, including the establishment of linear equations, the construction of Hessian matrix, the construction of the gradient vector, and solution of linear equations. The proposed algorithm is used to evaluate unfold two curved surfaces. The results show that the proposed algorithm is stable, has fast convergence speed and high precision. For expansion operation is simple, it can be used in the optimization of complex curved surface.