Abstract: The resource utilization of food waste (FW) has received widespread attention.Incineration, burying and composting, anaerobic digestion are increasingly criticized for their problems of environmental sustainability.Feed processing technology can convert FW into high-value feed, reducing solid waste emissions, breeding costs, and environmental pollution.Feed technology is in line with the principles of reduction, reuse and recycling of organic waste treatment.The authors reviewed the feed technology of FW and its application in animal production.Feed technology mainly includes heat treatment, enzyme treatment, algae culture, insect breeding, and fermentation technology.Heat treatment can ensure the safety of microorganisms, which is the pretreatment technology of all technologies.Algae culture and insect breeding technology can transform waste sugars and amino acids into plant and insect proteins and avoid homologous pollution.However, it is not clear whether algae and insects can accumulate pollutants in the process of FW utilization.Enzyme treatment and fermentation technology can transform macromolecules into small molecules.The catalytic performance and stability of enzymes are easily affected by external conditions, so it is necessary to consider special enzyme preparations.Fermentation has a high degree of mechanization and resource utilization.The core of fermentation technology is microorganism, which should be effective and able to make full use of FW.The application of FW in animal production is less at present.In the production and application, it is need to pay attention to the dosage and use time of FW feed.In order to make FW feed really enter the food chain as animal feed, researchers must study the growth performance and product characteristics of different animals (include different growth stages) to ensure that animal health and their products have no negative impact on human health.

Key words: food waste; feed technology