The XLJ76 series casement insulated aluminum vacuum glass window independently developed by our company, which is matched with vacuum glass and realizes material saving, lightness and thinness, and excellent performance, has passed the inspection of the National Center for Quality Supervision and Inspection of Building Engineering. All performances have reached excellent standards. The heat transfer coefficient K value is 1.0. The whole window thickness is only 76mm. Compared with other doors and windows of the same performance and material, it reduces 5Kg per square meter, saves 30% of profiles, saves space at the same time, is easy to operate, reduces the requirements for wall load-bearing, reduces installation safety hazards such as doors and windows on exterior walls, ensures personal safety, and also greatly reduces carbon emissions in the profile production process.