Objective: Prediction of fracture development degree in buried hill reservoirs is a technical problem in the exploration and development field. Although many methods, such as seismic characterization, seismic attribute extraction, peripheral drilling data disclosure and core observation, are used to predict the distribution of underground fractures at present, there are many problems to be solved.  Methods: 〖WTBZ〗Using the finite element numerical method, the development degree of fractures in the HZ26 Structure in the HZ26 subsag，Pearl River Mouth Basin, is predicted, and the prediction process is put forward. Firstly, the appropriate geometric model and mathematical model are established based on the fault growth connection analysis and the evolution history. Then, through giving mechanical parameters and boundary conditions, the paleotectonic stress fields of Wenchang and Enping periods, which are the main formation periods of fractures, are simulated. Finally, the development degree of reservoir fractures is predicted by analyzing the magnitude and distribution of tensile stress and shear stress.  Results: The simulation results show that the strong fracture development area in Wenchang period is located in the west section of F2 fault and the west section of F1 fault. At the HZ26 Structure in the HZ26 subsag，Pearl River Mouth Basin, the fracture development intensity is strong in the high part of the structure, the fracture development is weak in the well 4, and is good in the well 7. Affected by the change of stress direction and magnitude, the main fracture development area is concentrated in the high part of the HZ26 Structure in the descending plate of F2 fault during the Enping period. The prediction results are consistent with the drilling results, which proves the practicability of this method in the prediction of buried hill fractures.  Conclusions: The finite element numerical simulation method can not only recover the distribution of structural stress field during the formation of structural fractures, but also predict the distribution and development degree of structural fractures in reservoirs, which provides technical support for the exploration and production of buried- hill fractured reservoirs.