Abstract: Abstract: Agricultural solid wastes refer to the unwanted substances generated in agricultural production activities, indicating the features of complexity, pollution, seasonality, and diversity. Serving as an important source of agricultural non-point source pollution, the agriculture solid wastes have posed a great threat on the ecological environment, as well the quality and safety of food products. In China, the utilization of agricultural solid waste has been written into the law for the first time in April 2020, i.e., "law of the People's Republic of China on the prevention and control of environmental pollution by solid waste", where clearly defined the recycling responsibility of solid waste producers to prevent environmental pollution, including the collection, storage, transportation, utilization, disposal. A large amount of agriculture solid wastes have been eliminated due to disease, including 3.8 billion tons of livestock and poultry waste, nearly 900 million tons of straw, more than 2 million tons of discarded agricultural film, and 60 million pigs. It infers that there is extensive amount of agricultural solid waste, further to accelerate the risk of ecological environment pollution, particularly by disorderly dumping and random incineration. It is necessary to control pollution of agricultural solid wastes, thereby to maintain ecological safety and sustainable development of rural economy. This paper aims to identify the main source of agricultural solid wastes, classification method and the major characteristics, based on the connotation and extension of agricultural solid wastes. Agricultural solid wastes were classified according to the sources, toxicity, composition and morphology. The key features of agricultural solid wastes were identified, including the sources of single and dual nature in various types, potential pollution, the two sides of important resources, the anniversary variation, and the complexity of seasonal fluctuation. Potential pollution risks of solid wastes were determined, including solid wastes from agricultural cultivation, livestock, poultry, aquaculture, and primary processing of agricultural products, as well discarded agricultural inputs. Representative regulations and policies were sorted out for the prevention, treatment and utilization of agricultural solid wastes. The operation and supervision system can be clarified for the whole production chain of agricultural solid wastes in the near future. Technological paths and models were proposed for the treatment and utilization of agricultural solid wastes, including "classified treatment, multiple measures, overall consideration, green circulation, reduced reuse and precise disposal". This finding can provide the basic support and decision-making reference for the guidance to the treatment of agricultural solid wastes and their pollution prevention.