Improved mutton sheep is one of the domestic animals with the strongest adaptability to the external environment, with wide feeding habits, rough feeding tolerance and strong anti-stress ability. Feeding mutton sheep has the advantages of low investment, fast turnover, stable benefit and high return rate. In recent years, some changes have taken place in the mutton market at home and abroad, which provides a huge space for the development of mutton sheep industry and makes mutton sheep production a gold industry.