The purpose of the research is to reach the scientific and practical basis of the use of the mi-cronized wheat grain when feeding the Large White sucking pigs. The approbation of the process of the feeding grain micronization is carried out with the help of the built systems for the grain mixture magnetic cleaning and the installation for the grain micronization. Two scientifically-managemental and physiological experiments were conducted to study the effect of the mi-cronized grain mixture on the growth and the physiological state of the Large White sucking pigs from birth till 2-month age. The analysis of the diets showed that the structure and the amount of the feed given to all the groups were similar. However, because of the changes in the chemical composition due to the influence of IR-rays on the grain of the feed mixture, the diets of the pigs from the test groups were more nutritious than in the controls. Basing on the results of the first experiment, it was concluded that a more optimal performance for micronization is (in seconds): for barley – 38, wheat – 45, oats – 23, pea – 52. The inclusion of the micronized grain in the diets of the sucking pigs improves the nutrient digestibility, the nitrogen use and gross energy con-sumption, ensures more efficient use of metabolic energy, has no negative influence on the physi-ological state of the pigs, and as a result – increases the growth of the energy of the sucking pigs and the farming efficiency. It was found that the micronization process of the cleaned in an elec-tromagnetic separator feeding grain is more efficient when the temperature of the infrared radia-tion source is 1000K, the temperature inside the caryopsis is 180°C, and the atmospheric pressure is 10 atm. The processing conditions which help to improve the chemical composition of the grain were detected. During the micronization process with 60s exposure the easily digested carbohy-drates content increases by 7-8%, crude protein by 0.2%, in comparison with the grain in the ini-tial condition. It was proved that the use of the micronized wheat in the diet increases the rate of animal growth and reduces feed consumption per production unit by 25.19%.