Processing of waste into feed involves the need to grind it. Therefore, the study of research on this problem is relevant. The study aims to summarize scientific data on developing working parts for grinding feed from waste. In this regard, we analyzed scientific publications. As a result, it was revealed that the trend in grinding feed raw materials is the use of all types of food production and agricultural waste. Ten types of plant waste from the food industry and seven types of animal waste are indicated. It was found that the main working parts for grinding feed are technical devices for cutting, impact, abrasive-crushing, splitting-breaking, and impact-cutting action. It was revealed that an evident trend is improving working parts for intensive grinding based on optimal design developments of working parts, increasing the efficiency of working surfaces and design and technological parameters, and combining several methods of destroying feed raw materials using one type of working part. In general, the disadvantages and advantages of saws (4 types), rollers and disks (7 types), hammers and knives (21 types), and shredder disk knives (4 types) are analyzed and summarized in tables.