This paper aims to explore whether the construction waste can be used as energy saving building materials and it comprehensively analyzes the energy saving properties of construction waste. The research method is that based on the concept of sustainable development, the research scope of energy-saving technology and equipment will be expanded. The analysis data of construction waste are obtained to provide a reliable basis for reducing the energy cost of buildings. The conclusion suggests that in the performance research of energy-saving building materials, the introduction of construction waste can not only maximize resource utilization, but also effectively control the building energy costs without affecting the quality of construction projects. Therefore, there is a high feasibility for construction waste to be used as energy saving building materials.