PHA is a bio-based degradable material, which is made of renewable biomass and synthesized by microbes. PHA is a kind of non-toxic and even edible degradable plastic with superior performance in biological non-toxic. The recycling and treatment of PHA also has unique advantages - the traditional waste plastics are generally disposed by landfill or incineration, resulting in land, air and other pollution problems. However, PHA can be used as feed to generate economic benefits after being processed in a series of treatments, realizing the dual circulation of material and economy. In addition to green and non-toxic, the raw materials of PHA also have the characteristics of low-carbon and sustainable development. Under the background of China's carbon peaking and carbon neutrality goals, low carbon in the whole process is essential to help achieve the goals.