| With the control of Berkshire and Yorkshire pigs, carcass and meat quality traits of Shaziling, 1/2 Shaziling (Berkshire×Shaziling), 1/4 Shaziling(Yorkshire×(Berkshire×Shaziling)) were investigated, and the correlation between expressions of amino acid transporter genes and amino acid content was analyzed. The results demonstrated that carcass yield, carcass length, lion-eye area, ham percentage and lean percentage tended to increase gradually as Shaziling genes decreased, while the average backfat thickness, skin thickness and fat percentage exhibited the opposite change. Furthermore, the main index of carcass traits in Yorkshire×(Berkshire×Shaziling) pigs was very close to that in lean type Berkshire and Yorkshire pigs. The marbling score, water holding capacity and intramuscular fat content were higher in Shaziling or Yorkshire pigs, and lower in Yorkshire pig. Meanwhile, Yorkshire pigs had higher drip loss and water content. The total contents of saturated fatty acid and monounsaturated fatty acid were decreased in Yorkshire×(Berkshire×Shaziling), Berkshire×Shaziling, Shaziling, Berkshire and Yorkshire pigs in turn, whereas the content of polyunsaturated fatty acid was increased in turn. And, the contents of essential amino acid, flavor amino acid and total amino acid in Shaziling pigs were significantly higher than those in other groups(P<0.01). In addition, significant positive correlation between amino acid transporter gene CAT1 expression and amino acid content was observed(P<0.01), implying that CAT1 gene is closely related to amino acid content. Compared with Berkshire and Yorkshire pigs, Shaziling and its crossbred pigs had higher water holding capacity. In Yorkshire×(Berkshire×Shaziling) pigs, the intramuscular fat content was moderate, the contents of essential amino acid, flavor amino acid, total amino acid, saturated fatty acid and monounsaturated fatty acid were rich, suggesting that Yorkshire× (Berkshire×Shaziling) pigs has an advantage over pork flavor and meat quality. Taking into account the former fattening performance and consistency of coat color, Yorkshire×(Berkshire×Shaziling) is an ideal cross combination of Xiangsha synthetic line pigs.