The invention discloses a method for cultivating a high-quality specialized strain through Tibetan pigs. Duroc and the Tibetan sows are utilized for hybridization to breed a grading first-filial generation, Duroc boars in a core group and breeding core group sows of the grading first-filial generation are used for hybridization to serve as a grading second-filial generation, the Duro boars in thecore group and the breeding core group sows of the grading second-filial generation are used for hybridization to serve as a grading third-filial generation, the Duro boars in the core group and the breeding core group sows of the grading third-filial generation are used for hybridization to serve as a grading fourth-filial generation, grading fourth-filial generation boars and sows are subjectedto athwart crossing to serve as a zero generation, and athwart crossing is fixed; then generation breeding is carried out, and the high-quality specialized strain is obtained through breeding. The bred specialized strain has the straight back and belly, strong four limbs and the solid limbs and hoofs, achieves good body combination, and is developed in leg and buttock, good in fecundity, good in fattening performance, high in feed conversion rate, high in carcass performance, high in meat quality and free of PSE or DFD meat, the longissimus dorsi pH ranges from 6.0 to 6.5, and the rear leg proportion is larger than 35%.