Abstract: In order to study the change rules of myofibrillar proteins of Wenchang chicken in the frozen storage process, myofibrillar proteins degeneration situation under frozen temperature- 18, - 30, - 78℃ were detected based on salt soluble of myofibrillar proteins, Ca2 +- ATPase activities, sulphydryl group contents and texture analysis.Here result indicated that the biochemical characteristics of the myofibril protein tended to be more stable along with the lower frozen storage temperature and shorter frozen storage time.Test results showed that salt soluble of myofibrillar proteins significantly reduced by 41.7%, 39.9% and 33.3% respectively during- 18, - 30 and- 78℃ storage, which PTV were set as the preset temperature values, and Ca2 +- ATPase activities decreased correspondingly with the frozen storage time in the early 10th day test period.The 10th day, Ca2 +-ATPase activities reduced by 46.15%, 44.62% and 41.54% respectively under PTV conditions.And sulphydryl group contents decreased in range of 0 ³0d.The 30th day, they reduced by 41.27%, 37.81% and 34.29% under the same PTV conditions.In addition, the hardness, elasticity and cohesiveness of the Wenchang chicken reduced with the frozen storage time to some extent.Moreover, Ca2 +- ATPase activities and sulphydryl group contents were found to be highly related to texture evaluation by Pearson Corralation coefficient analyzing.