The aim of our research is to study the milk productivity of Holstein cows in the dynamics of lactation, the correlation between the level of milk yield, fat content, and the amount of milk fat, live weight and milk. The studies were carried out in the herd of the Society of limited liability (SLL) “Doksancom” breeding farm on Holstein cows imported from Holland. The main data on the milk production of animals were taken from forms of zootechnical and pedigree accounting. Lactation curves of cows were constructed, and was calculated the milk coefficient (MC) proposed by Startsev (1965). The relationship between milk productivity indicators and milk quality, live weight was determined by calculating the correlation coefficient using Microsoft Excel, the reliability of the indicators was determined by Student. Studies have shown that cow yields increase with increasing live weight and a maximum milk yield - 11686 kg or 109% of the average is obtained with a live weight of 685 kg. Cows of the fourth lactation in live weight exceeded the data obtained on average (657 kg) for the analyzed animal population by 28 kg, the difference was significant (P<0.001). The lactation curve at all analyzed cows of the Holstein breed of the herd of SLL “Doksancom” changes with a certain regularity and has a leveled character, characterized by a high stable type, which is characteristic to animals with a strong constitution, having high milk productivity. By the analysis of the variability of signs was established that the greatest variability at a positive correlation is observed between milk yield and the amount of milk fat, live weight and the amount of milk fat (Cv = 26.3; fourth lactation), also at a high positive correlation between milk yield and milk coefficient, between the amount of milk fat and milk coefficient (variability from 16.0 to 21.9). Consequently, the highest coefficients of variability are noted for milk yield, milk fat and live weight. Relatively high indicators of milk ratio indicate the level of productivity of cows and the express of the milk type. Cows of the fourth lactation have the highest milk yield coefficient - 1704.8 kg of milk. A negative relationship between the fat and milk yield indicates that further selection for one of these features in the SRL "Doksancom" herd should be carried out taking into account the other