In the study the possibility of growing of calves of young growth of the lactation period at moderate-ly low temperatures in the conditions of Eastern Siberia was considered. In recent years production tests and pilot studies of the method of growing of calves in the conditions of moderately low adjusta-ble temperatures were carried out. New energy saving technological solutions of cultivation of new-born calves which are most satisfying to physiologi-cal requirements and zoo-hygienic reasonable temperature condition for calves from 4- to 180-days of age during winter period were fulfilled at the temperature of -5 °C with fluctuations from -2° C to -8°C. The essence of the method of growing calves is that keeping newborn calves up to 15-days of age in not heated rooms in individual cages, with 15-to the 120-day - in calf houses groups up to 20 heads, and from 4-months age groups up to 40-50 of the heads on technology free pasture keeping. The adaptation peculiarities of young calves of lac-tation period to low temperatures in the farms are in fact that the adaptation of a calf to the cold begins with the antenatal (prenatal) period. Calves grown according to this technology of keeping and feeding rarely get sick, and the live weight gain in the first 2 months of growth was 750-850 grams a day. It was established that calves grown in the conditions of moderately low regulated temperatures from 4-days of age to 60 days most vigorously had the formation of cardiovascular, respiratory, ther-moregulatory, digestive, and hematopoietic and immune systems. All these had beneficial effect on the productive performance, i.e. the average daily gain in live weight. The calves of experimental groups of all ages had a larger increase in body weight compared to the growth rates of young calves grown according to traditional technology: in calves up to 60 days - by 20.4 %, and in calves in 60-180 days - by 10.8 %.