As is known to us, producing tradition wall materials will consume lots of energy and spoil the environment. Therefore, new-type wall has aroused great concern among people in construction, which is green, insulating and energy-saving and so on. External insulation, promoted as an energy-saving technology in building insulation, has three more mature technologies. This paper also introduces polyurethane insulation material, as the third generation of energy-saving wall materials, has a very good application prospect in scientific research. Finally, in the last of the paper, relative countermeasures and suggestions are made to improve the status and development of new-type wall materials, for instance: we should make the most of industrial waste, make deep research in new composite wall systems and wall materials; take some effective measures to accelerate the application of new wall materials and so on.