A resource population constructed by F2 design with Landrace and Chinese indigenous Lantang pigs was used in this study. Seven microsatellite DNA markers on chromosome 6 and USDA2.6 pig genetic linkage map were used for interval QTL mapping. The results revealed that at the position of 38-41 cM there was a chromosome-wide highly significant QTL affecting carcass backfat A thickness (P<0.01), which was closely linked with MN007 and the ratio of QTL additive variance to F2 phenotypic variance was 5.90%. At the position of 60-70 cM there were two chromosome-wide significant QTLs affecting carcass lean percentage (P<0.01) and skin and fat percentage (P<0.05), which were closely linked with MN003 and the ratio of QTL additive variance to F2 phenotypic variance were 18.44 and 3.75%, respectively. At the same position, there was a single-point QTL also closely linked with MN003 and highly significantly (P<0.01) affecting carcass lean. In addition, there were two chromosome-wide highly significant (P<0.01) QTLs affecting meat color and marbling, which were closely linked with MN13 at the position of 70-75 cM and the ratio of QTL additive variance to F2 phenotypic variance were 14.05 and 1.77%, respectively.