Fractured reservoirs, as a kind of complex and special reservoir type in the field of oil and gas exploration and development, show a significant difference from conventional pore-type reservoirs in terms of geological structure, fluid storage and flow pattern, etc. These special features not only increase the development difficulty, but also determine the specificity of its development technology route. In order to improve the development effect of fractured reservoir and accurately portray its internal structure and seepage law, this paper carries out the research of fractured reservoir modelling law, analyzes and compares the various numerical simulation methods with a typical fractured reservoir as the object of research, establishes a fractured reservoir by using the DFN model, and coarsens and historically fits the fracture model, which is in line with the actual cognition. It is determined that the DFN model has a good suitability for fractured reservoirs, which provides a reliable basis for the formulation of the subsequent development plan, and also provides a reference example for the modelling of the same type of fractured reservoirs.