Based on the results of regional geological surveys, drilling data analysis and structural analysis of 3D seismic data, there are two distribution types of the Jurassic, which are “superimposed type” and “non-superimposed type”, are determined in and around Erlian basin area. “superimposed type” Jurassic is distributed in Erlian Basin area, while “non-superimposed type” Jurassic is distributed in the north (represented by Wuliyasitai Sag) and around the Erlian Basin, and is subject to the control of \" three vertical and four horizontal \" tectonic frameworks. Early Yanshan Era is in a turning point from north-south direction compression tectonics to back-arc tectonic regime of the western Pacific which plays a major role in Erlian Basin. There are two types of basin in early Yanshan Era, in which \"superimposed type\" Jurassic has the nature of rift basins, while the \"non- superimposed type\" Jurassic is presumably atypical cratonic basin with backarc setting.