Abstract: The Kong 2 Member in the Cangdong sag, the Dagang exploration region, is typical continental shale oil reservoir. It can’t be fractured based on the applicable brittleness index model for marine shale oil reservoir at home and abroad. According to geological analysis and core triaxial test, a brittleness index model describing the whole deformed and damaged process of the rock was established for the shale oil reservoir in the Kong2 Member using the fractal method. Then based on the analysis of how natural fractures propagate, the method for calculating the influencing factors of natural fractures and geostress were defined, and finally a fracture network index model integrating rock brittleness, natural fractures and geostress was built for quantitative prediction of the fracturability of the shale reservoir. The model is used to build the fracturability index profile and optimize the cluster spacing, perforating and fracturing parameters of horizontal wells. And together with optimized slip water + low-damage fracturing fluid, and quartz sand + ceramsite proppants, the volume fracturing technology for shale oil horizontal wells was developed. The technological achievements have been applied in Wells GD1701H and GD1702H. And micro-seismic survey and stable electrical field monitoring have found complex fracture networks, indicating remarkable effect of increasing production.