With the improvement of people's living standard and consumption level, the garbage problem in China has become increasingly urgent. Many cities are surrounded by rubbish. Facing the increasing garbage output and deteriorating environment, the China Municipal Government is vigorously promoting the garbage sorting policy. Garbage classification refers to the classification of garbage into recyclable and non-recyclable, which requires people to put garbage into different trash cans and make it a new resource through different cleaning, transportation and recycling methods. It can not only reduce the amount of garbage to be treated, but also reduce the treatment cost and land use, which is beneficial to our society, economy and environment.