Relevance. The safety of lambs is the most important factor affecting the efficiency of the industry. It is of particular relevance for multiple breeds. The level of dairy productivity of ewes is one of the factors affecting the growth and development of lambs, their safety before weaning. Milk productivity is positively correlated with the dynamics of the live weight of lambs.The aim of the study was to study the milk content of crossbred ( 1/2 southern meat and 1/2 Katum) and purebred (southern meat) ewes, the effect of this indicator on the growth of lambs.Methods. The objects of the study were purebred (n = 46), crossbred ( n = 30) ewes and their lambs. To determine the amount of milk produced by a ewe over 20 days, the increase in live weight of lambs during this period was multiplied by a factor of 5 (on average, up to 5 liters of milk are required for an increase of 1 kg). In multiple-fetal ewes, milk production was determined by multiplying the sum of the growth of all lambs in the litter by 5.Results. The number of lambs in the litter and the genotype of the ewes have a statistically significant effect on the live weight of lambs at birth and the milk production of ewes. Lambs born alone in a litter exceeded double lambs by 18.1% and triple lambs by 22.6% in live weight. Multiple ewes are superior in milk production to ewes with one lamb. In terms of the amount of milk produced in 20 days, ewes with triplets exceeded their peers with one lamb by 2.24 times, and with twins — 1.52 times. Crossbred (1/2 southern meat and 1/2 katumskaya) ewes are higher in milk productivity than the maternal breed.