Abstract: For a long time, there is a controversy about the age and sedimentary facies for the Shipu Group. During last two years of studies on the Formationsof the Group,the author has discovered various kinds of fossils from the limestones at the upper part of the group. Through the analysis on isotopicage date of 9 samples, it is suggested that the group is attributed to the lower Cretaceous with a transitional facies between marine-non marine.