The main characteristics of wood-wrapped aluminum doors and Windows- -thermal insulation.After the use of broken heat cold bridge, to overcome the inherent high thermal conductivity of aluminum alloy, while maintaining the important performance of aluminum alloy-easy extrusion molding, easy processing, corrosion resistance, beautiful color, strong, durable, light weight, recyclable and other characteristics.Combined with hollow glass and sealing materials, to achieve the function of heat insulation and energy saving.The nylon PA66 connector with very low heat transfer coefficient is connected between the aluminum and wood profiles to form an effective heat break layer between the inner and outer parts of the profiles, and block the heat loss through the door and window profiles, so as to achieve high efficiency and energy saving, making the heat transfer coefficient of the whole window = 2.1w-2.3w/w2K.