The invention relates to the technical field of livestock breeding, and specifically relates to a mutton goat breeding method. The method comprises a breed selection stage and a breeding stage. (1) In the breed selection stage, a male parent Jianyang large-ear goat is hybridized with a female parent Mabian goat, such that an A1 generation is obtained, and goats in the A1 generation are selected for breeding; (2) in the breeding stage, 1, during a young goat stage, ewe breastfeeding is carried out in the 35 days after the birth of the young goats, and milk powder auxiliary feeding is carried out in the 36th-60th day; and 2, during a growth early stage, a first feed is used for feeding goats with ages of 2-4months twice a day, wherein the first time is 2:30-5:30, and the second time is 19:00-19:30. With the method provided by the invention, goats have strong muscles and developed limbs. A pure meat percentage reaches 55%, and a lean meat proportion is substantially improved. The goats reach a slaughter stage fast, which is approximately 2 months faster than that of local goats. Therefore, mutton yield is greatly improved.