The principle and the method of sedimentology and the sequence stratigraphy are applicated, used the field exploration material and combinated basin areal structure evolution characteristic analysis, obtaining that on fountain group of Songliao basin the region plane of unconformity, the ancient exposed contact surface, the stream erosion washout surface, lothological and the lithic facies were distinguished. Meantime, a second stratic interface, two third stratic interface and a fourth stratic interface were distinguished. Finally, three are divided on fountain group, establishes the high accuracy sequence stretum rack, makes prepare for seeking for the new hydrocarbon reservoir in the future.%应用沉积学和层序地层学的原理和方法,利用野外勘察资料,结合盆地区域构造演化特征分析得出,在松辽盆地泉头组共识别出区域不整合面、古暴露界面、河道侵蚀冲刷面、岩性及岩相分界面四类层序界面；并识别划分出一个二级层序界面、两个三级层序界面、一个四级层序界面.最终将泉头组划分为三个超层序组,建立高精度层序地层格架,为以后寻找新的含油气层做准备.
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