Key measures to improve the efficiency of large-scale breeding sheep Lake: Note sheep farm hygiene, timely cleaning pens, sheep base, regularly organizes disinfection. Attention to climate change, Hu sheep base, keep warm in winter, summer pay attention to heatstroke. Daily to ensure adequate water intake, the number of appliances to ensure that drinking water and regular cleaning. We can say that the lake sheep farming only do scientific management, fine, in order to effectively reduce the incidence of disease and mortality, effectively raising sheep farm breeding efficiency. No breeding ewes estrus cycle is generally 17 days to 18 days, Henan sheep base, under normal circumstances, the old ewe weaning after 12 days or so will heat, Shanxi Zhongyang base, reserve ewes generally 5-6 months to reach sexual maturity, breeding must reach 50 pounds or more. Conditional farmers can produce with artificial insemination, most farmers are produced with free mating, general sheds a ram with a 6-7 ewe, ram and ewe with 42 days are basically 98% It can be coupled.