The oracle bones from southern area in “shiao-tun” was excavated by Ang-yang group of Chinese academy of social science in 1973. Compare with fifteen times excavations by Academia Sinica before, these cultural relics are provided with more particular significance about historical science. This excavation used progressive technique, therefore decreased difficulties of binding work. At the same time, every pieces of oracle bones has exact record of stratum, it is an important advancement in the history of Yin-ruin archaeological excavation. In the past, the research of oracle bone script proceeded by academic circle always laid particular stress on division of history into periods, it’s a pity for scientific investigate. Now we attempt enlarging the range of research, and lay out a study about language category and development. About the age, the mass of these oracle bones contain “kong-ting”, “Wu-yi” “Wen-ting”, three dynasties in late section of Yin period. In the study, we believe that the sentence pattern of three dynasties should be similar as their connected age. In the meanwhile, those scripts that had been named “Li-group” and dated to late section of “Wu-ting” dynasty by some research workers should be dated to middle period of Yin again. We believe that the wording of “Wu-ting” had been imitated by the writers of “Li-group” sedulously, and this result conforms to the theory that Dung tso-pin had ever brought up. In this article, we discuss the sentence pattern of oracle script for testing the rationality of this formulation.