Green concept is a design concept and method based on saving resources and protecting the environment, paying attention to the protection of natural ecology, making full use of resources, putting people first and protecting the environment (Zhaofu Hong et al., 2019). The content of the green concept can be said to be a new social and economic development mode that takes environmental protection as an important support for sustainable development under the condition of restricting the capacity of ecological environment and resource carrying capacity (Allenby and Fullerton, 1991). Including the following points: (Allenby and Fullerton, 1991; Deming, 1982) First, we should take environmental resources as the internal cause of social and economic development. Second, to achieve sustainable economic, social and environmental development as the goal of green development (Kaufmann, 2015). Third, "greening" and "ecologicalization" of the process and results of economic activities are taken as the main content and approach of green development. From these points, the green concept puts forward three requirements: (Kaufmann, 2015; Ivan Bergier et al., 2019) First, environmental resources should be fully considered in the design of recycling (reproduct); (Ivan Bergier et al., 2019). The second is to form a cycle, so that the production of goods after the completion of the function can become renewable resources (recycling) (Kamphuis et al., 2015). It requires less input of raw materials and energy to achieve the established production or consumption purposes, thus paying attention to resource conservation and pollution reduction at the source (Andretta et al., 2016b). All three principles focus on the environmental impact of products. In order to achieve the green concept, there are many methods to study and implement, the important is in the design stage, with green design as the initial purpose of engineering design (Hao et al., 2014). Including green structure design, green energy design, green packaging design, green manufacturing process design. From the perspective of energy conservation and pollutant management, the green development of the capital is measured according to people's willingness to live in a green environment (Holt and Barnes, 2011). The specific content is the production energy consumption and urban pollutant treatment rate. Today, with the rapid development of social and economic development, (Li et al., 2016) environmental protection theory is deep in people's minds, animal husbandry is widely used, is a green concept to protect the environment, save a kind of livestock and poultry castings reuse. Feedstuff is the most important material in the development of animal husbandry (Martinez et al., 2009). It is difficult to continue using a large amount of grain to increase livestock production in order to increase livestock production. Therefore, it is not an important issue to develop the feed resources for the extensive utilization of feed resources. On the basis of green ideas, this paper discusses the recycling problem of poultry castings.
