Abstract: Hydraulic fracturing is a key technology for unconventional oil and gas exploration. In the process of hydraulic fracturing, the interaction of hydraulic fractures and natural fractures to form a complex fracture network is the premise for the efficient exploitation of unconventional oil and gas, and the design of perforation scheme has an important impact on the complexity of the fracture network. In order to further study the evolution mechanism of the fracture network, simulate the fracture propagation process of the real jointed fractured rock mass in hydraulic fracturing, and optimize the perforation plan scientifically and reasonably, this paper adopts the method of global embedding of cohesive elements, and uses Python to carry out the second development. A DFN discrete fracture network was created, and a natural fracture model of the rock mass considering the discrete fracture network was established. At the same time, the models without DFN discrete fracture network were set under the same conditions for comparison, and the influence of different angles of perforation schemes on the fracturing effect was studied. The acoustic emission localization map and acoustic emission energy data during the loading process are extracted by MATLAB programming, and the crack rupture mechanism and propagation process are further analyzed. The results show that the activation of natural fractures is affected by the stress shadow generated between perforations and the angle between perforations and natural fractures; the distribution law of natural fractures in shale is identified, and the angle between perforation and natural fractures is improved to make hydraulic fractures easier. It communicates with and spreads along the natural fractures to form a complex fracture network.