The shale developing in the Lower Cretaceous distributes widely in Gamba-Tingri basin. The shale gas exploration potential has been evaluated through the analysis of its thickness，organic abundance，organic evolution and brittleness.Cretaceous Gamba-Dongshan Formation in the study area consists of a set of shale or silty shale having siderite nodules or strips，which was formed under shelf-slope depositional environment. The formation distributes widely in the horizon direction including Tingri，Tingjie-Bamba and Gyangze-Nagarze areas，where shale thickness is generally over 100 m. Its organ? ic type is good mainly developing sapropelic or partial sapropelicⅡ1 type. And the organic matter is overall high mature or over mature and generates moisture-dry gas mainly. The shale mineral composition mainly consists of brittle quartz and feldspar，which is favorable for induced fracture formation and has strong adsorption at the same time. It is concluded that the shale in the Lower Cretaceous of the Gamba-Tingri basin has favorable conditions for shale gas accumulation based on organic geochemical parameters analysis and other shale gas exploration practice.