Abstract: Breeding sows of the synthetic line WS501 in Wens in this study were from the second area of Qingyuan breeding pig farm. In this paper, the breeding data of the pig farm from 2014 to 2017 were analyzed and its reproductive characteristics were discussed. After 10 years of breeding, the breeding sows had characteristics of early oestrus, more estrus cycle, fast growth, early mating age and large litter size; the breeding boars had characteristics of muscular body, fast growth, good semen quantity and quality. The results can provide scientific basis for breeding of fine breeds.