Abstract: With the large-scale development of pig industry, the pork market chain effect has been formed and gradually tightened in China, which reflected in multiple demands of market pigs including large body weight, high carcass lean ratio and better meat quality. One of the goals of current commercial pork production is the big market weight, but the problem is backfat thickness increasing subsequently, the excess fat is resisted by more and more urban and rural residents. The meat quality performance, both the gene level (halothane heterozygous individuals in large weight are closer to the homozygous positive pigs) and delay in the slaughter process innovation (large eye muscle area and thick eye muscle depth cause central temperature to be harder to cool), are not conducive to guarantee and improve meat quality. This paper expounds the measuring of back fat, loin eye muscle area and eye muscle depth of live breeding pig according to the carcass lean ratio of market requirement, and for selecting scientific instrument to meet the needs of pricing the carcass.