With the development of industry, the problem of energy consumption in China is becoming more and more serious, especially in the fields of architecture, industry and people's livelihood. At present, a large part of buildings in China belong to high-energy buildings, which not only causes energy waste and environmental damage, but also restricts the development of China's national economy to some extent. Therefore, green building is the inevitable trend of future building development. Only by advocating energy conservation and environmental protection in building materials industry and construction industry can it contribute to the further development of China's economy.

1 Overview of Building Material Energy Saving and Building Energy Saving

1. 1 energy saving of building materials

The so-called energy saving of building materials mainly refers to energy saving and environmental protection of building materials. Implementing energy-saving of building materials in construction projects can greatly reduce the generation of construction waste, thus saving resources and energy, thus reducing the environmental pollution caused by construction waste from the aspect of building materials and providing effective guarantee for the improvement of ecological environment. In construction engineering, building materials can usually be divided into recyclable materials, reusable materials and renewable energy [1]. Among them, recyclable materials mainly refer to the use of certain methods to change the shape of materials that can no longer be used to form another reusable material; Reusable materials mainly refer to the repair or combination of resources that can still be used in materials, so that they can be reused without changing the original shape of materials as a whole; Renewable energy mainly refers to wind energy, hydropower, geothermal energy, tidal energy, solar energy and other renewable energy that can be directly obtained from nature.

1.2 Building Energy Conservation

The so-called building energy saving mainly refers to improving the lighting system and heating system in buildings by using science and technology and certain means to reduce energy consumption; Make full use of the natural energy around the building and improve the efficient utilization rate of energy, thus promoting the development of green buildings to a great extent. Heating system is one of the indispensable systems in buildings, and it also consumes the most energy. If the heat lost by buildings can be reduced, the energy consumption of heating system can be greatly reduced. Specifically, to achieve building energy conservation, we can start from the following aspects: first, make full use of solar radiation heat energy and internal heat energy of buildings; Second, improve the tightness of building doors and windows to reduce the heat consumption caused by air infiltration; Thirdly, to a certain extent, reducing the external area of the building and improving the thermal insulation performance of the building maintenance structure can also reduce the heat consumption caused by heat transfer.

2. Correlation between building materials energy saving and building energy saving issues

2. 1 Problems related to energy saving of building materials

In the field of energy-saving building materials, the main problems are as follows: First, the relevant links of construction production are not up to standard. Due to the relatively high price of energy-saving building materials on the market at present, some construction workers cut corners and shoddy materials in the construction process, ignoring the rationality of building materials collocation, and the relevant managers did not supervise and audit in time and systematically, resulting in many building materials failing to meet the energy-saving standards [2]. Compared with other building materials with the same purpose, the cost performance of energy-saving building materials is relatively low. Due to economic factors, it is still difficult to implement energy-saving building materials on a large scale in the construction market. In addition, the lack of understanding of energy-saving concept is also one of the main problems in the field of energy-saving building materials, and many people have not realized the benefits and importance of using energy-saving building materials. Secondly, the construction of the building is not in place. At present, many construction workers can't design and construct energy-saving building materials reasonably and scientifically, which limits the advantages of energy-saving building materials to some extent.

2.2 Building energy-saving related issues

In the field of building energy conservation, building energy consumption is the core issue. At present, many buildings consume too much energy and have low energy utilization rate. Take the northern area as an example, buildings need heating in winter, but at present, the heating system of most buildings mainly consumes coal resources, and consumes a lot of non-renewable resources every year, which also causes serious pollution to the natural environment such as the atmosphere, which greatly restricts the further development of our economy. Moreover, in many urban buildings, many air conditioners used for heating will have problems such as low heating efficiency, insufficient air tightness, and insulation of related maintenance devices. In addition, there are quite a few construction workers in China who have insufficient awareness of building energy conservation. As early as 1980s, many developed countries in the west have made great achievements in building energy-saving technology while developing their economies, but China has not considered too much in this respect [3].

2.3 the correlation between the two

From the above situation, there is a waste of energy in the field of building materials energy conservation and building energy conservation. Building materials are the foundation of building construction. If building materials are seriously wasted on energy, it will also greatly affect the energy saving of buildings. In addition, there is still a lack of understanding in the fields of building materials energy saving and building energy saving, which reflects to some extent that the popularization of energy-saving building concepts in China is still not in place.

3 correlation between building materials and building energy-saving measures

3. 1 Energy-saving construction measures for building materials

The rational application of renewable energy in building construction, such as the rational use of solar energy in building design, can realize solar photovoltaic power generation. In addition, the waste generated by building materials can be fully utilized, which can not only save part of the construction cost, but also reduce the environmental pollution caused by construction waste. For example, breaking waste rubber into particles and mixing them into concrete in construction departments can not only improve the crack resistance of concrete, but also save construction costs and reduce environmental pollution.

3.2 Building energy-saving construction measures

Building energy saving is mainly manifested in improving the heating efficiency of building heating system and reducing the heat dissipation of building envelope [4]. In the process of building, the thermal insulation performance of walls, doors and windows of the building can be improved, and the shape coefficient of the building needs to be controlled. At the same time, the layout of the building can be scientifically and reasonably adjusted to enhance the energy-saving effect of the building.

3.3 Correlation between the two

Energy saving of building materials is a very important part of building energy saving. If energy-saving of building materials is not done well, then building energy-saving is impossible. If building materials with energy-saving effect can be applied to the relevant design of building energy conservation, not only can energy consumption be reduced, but also the thermal insulation function of Zhu Lou can be fully exerted, making the building more in line with the new concept of energy conservation and environmental protection.

With the change of people's concept, the concept of energy conservation and environmental protection is more and more deeply rooted in people's hearts. In order to truly realize the sustainable development of society, China must strictly implement energy-saving of building materials and buildings, which will fundamentally help the further development of the national economy, reduce environmental pollution and save construction costs.

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