Abstract: The ancient buried hill hydrocarbon reservoir found and proven in Niudong buried hill structural zone in Baxian sag of Jizhong Depression was Cambrian carbonate rock reservoir of Paleozoic erathorn. The reservoir space is mainly composed of vugs and fractures, with the physical property varying horizontally. The study of pre-stack elastic inversion was made in the light of the bottleneck that buried hill and buried hill inner curtain carbonate rock reservoir is has a strong heterogeneity. The pre-stack elastic impedance inversion technology and AVO attribute analysis technology were adopted in combination with post-stack wavelet decomposition and restructure technology to predict and describe the space distribution law of the fracture and vug system of the reservoir, divide the favorable development zones of the reservoir and clarify the fractural development zone and hydrocarbon abundance zone. The drilling results in this region show the carbonate rock reservoir of Niudong buried hill structural zone sees development of fractures with a good prospect for oil and gas, confirming effectiveness of the technology for prediction of characteristics of carbonate rock reservoir.