1. College of Earth Sciences��Jilin University��Changchun 130061��China; 2. College of Geo-exploration Science and Technology��Jilin University��Changchun 130026��China

Based on the regional geological data��electrical and seismic data��we research the stratigraphic�� sedimentary��tectonic features of Early Cretaceous basin group in eastern Jilin��restoring the sedimentary paleogeography and the visage of prototype basin�� Combined with the distribution of hydrocarbon source rocks controlled by the prototype basin and the residual basins transformation in the modern exploration��favorable exploration areas can be predicted�� We concluded that prototype basin in this region was a part of a large terrigenous lake basin in Early Cretaceous�� Guosong-Yingzuilazi formations sedimentary stage was the initial rifting isolated basin development stage��Linzitou Formation sedimentary stage was a fault-depressed diversionary stage��Shahezi-Yingcheng formations sedimentary stage was the time for unified depression basin��and the prototype basin was totally destroyed in Denglouku Formation sedimentary stage�� Since Quantou Formation sedimentary stage��every basin was into an independent development stage�� The ( fan) delta facies��fluvial facies and paludal facies deposition areas which near the lake center of prototype basin��and in the depression of present basins are the advantageous areas for oil and gas exploration of the basin group in eastern Jilin��