Abstract：The cracks not only serve as the major reservoir space, but also as the important fluid flow channel in deep buried carbonate fractured reservoirs, and the development of fractures controls the scale of reservoirs and the productivity of a single well directly. Such reservoir features deep buried depth and complicated distribution of fractures due to the reformation of reservoirs. The crack identification, fracture prediction, and fracture characterization are very difficult. In this paper, a modeling method of carbonate fractured reservoir based on the marked point process simulation theory is proposed. The fracture density distribution model is established through the single-well data interpolation under volume constraints with attribute of ants. Taking the fractured reservoirs in Tahe X area as an example, a discrete fracture network is built with fracture occurrence statistical data and fracture density distribution model constraints. The discrete fracture network modeling can be intuitively reflect the fracture's space form and structure, to provide an effective geological model for the research of connectivity, heterogeneity, and percolation characteristics of the fractured system. This method can be used in reservoir modeling and development of carbonate fractured reservoirs.