Abstract: Xing'an multi-lamb sheep is a new mutton sheep breed which is suitable for large-scale confined feeding in northeast regions of Inner Mongolia, which is typically characterized by high reproduction rate, fast growth and development, and good feeding benefit. In order to quantitatively analyze the reproduction performance and feeding benefit of Xing'an multi-lamb sheep, this study conducted a comprehensive analysis on the lambing data of Xing'an multi-lamb sheep collected from year 2018 to 2019 in Inner Mongolia Dumei Animal Husbandry Biotechnology Co., Ltd.. Through calculation, the multiple lambing rate of primiparous ewes was 80.48%, and that of multiparous ewes was 88.51%. The average litter size per ewe was 2.18 lambs, and 4.02 lambs were obtained per ewe per year. The average birth weight, weaning weight and average daily gain of 50-day-old lambs were 3.98 kg, 14.32 kg and 229.78 g, and the LEY index was 3.26. The net feeding profit of adult ewe was 2 367 Yuan per sheep per year. The results showed that Xing'an multi-lamb sheep has a good breed advantage and is suitable for large-scale promotion in northeast regions of Inner Mongolia.

Key words: Xing'an multi-lamb sheep;, Hu sheep, reproduction rate, LEY index