Facing the problems of the red beds “barren strata” division and correlation, a set of scientific, convenient method is formed in the division and correlation on synthetic stratum. It is based on the established in fully absorbing predecessors’ research. It takes many existing methods integrate, contain and confirm with each other. It contains the relationship between the top and bottom contact, lithological and electrical character for the interface, the scheme of multi integration, constraint of seismic data building the frame. According to the particularity of the red beds, the lithological and electrical character in response to a change in arid climate, it fully used the advantage of the continuous longitudinal in the data of test log and the constraint of seismic data. The method effectively solve the problems in the red beds of longitudinal division, horizontal comparison. It obtained good results in the application of the southern slope in the Dongying sag. The method could be used to provide the technical support in other parts of the similar complex stratigraphic classification and correlation.