Abstract: The carbonate rocks of Tsuoqin basin in Tibet,China have been researched in this paper.The charact eristics,reservoir space and reservoir type of the carbonate rocks are analized by means of geologic survey in field and laboratory analysis.The carbonate rock reservoirs of Lang mountain and Duoba group are evaluated.The result shows that Lang mountain group has a great sedimentary thickness,with well-developed dissolution and cracks,and is regionally relative stable and a major reservoir;the Duoba group is a minor one.Thus,this work filled in the gap of research on carbonate rocks in this region.