with the development of the economy and society and the improvement of waste management systems, the establishment of waste-free cities has become the planning goal of more and more countries and cities. the international community has established the no-waste international alliance, european countries established the no-waste europe network, and japan. organizations such as the non-waste research institute. the 2015 u.s. conference of mayors issued a resolution supporting the principle of no waste in cities. in 2018, 23 cities around the world jointly issued a declaration on the establishment of a waste-free city. eight cities including san francisco in the united states, vancouver in canada, kamikatsu in japan, masdar city in the united arab emirates, capannoris in italy, sydney in australia, ljubljana in slovenia, and auckland in new zealand have clearly proposed the construction of waste-free cities. . its construction effectiveness has been recognized by the international community. the experience of countries in different regions of the world in promoting the construction of waste-free cities has provided our country with valuable experience.