Abstract: To investigate the impact of perforation angle on the hydraulic fracture propagation in deep coal seams containing layering, finite element software ABAQUS combined with a cohesive element theoretical model was utilized for simulation analysis. Taking the deep coal and rock at well X in Z block of the Ordos Yishan slope as an example, the hydraulic fracturing process under different perforation angles (0°, 30°, 45°, 60°, and 90°) was simulated. The study focused on analyzing key parameters such as fracture propagation morphology, the number of branch fractures, fracture width, and fracture volume, as well as the effects of fracturing fluid flow rate and viscosity on fracture propagation characteristics. The results show that the fracture propagation is mainly controlled by the direction of the maximum horizontal ground stress, and the higher the consistency between the perforation angle and the direction, the longer the fracture propagation distance; after passing through the bedding, the crack opening decreases, and it is difficult to be captured by natural cracks at the beginning, but the probability of being captured increases with the increase of the crack opening; when the perforation angle approaches 90°, fractures are more likely to penetrate the layering or cleat, when it is less than 90°, it tends to spread along the bedding or cleat; increased flow rate significantly enhances the fracture width and length, particularly under conditions of 12 m³/min and the perforation angle of 45°, demonstrates optimal connectivity and excellent conductivity performance; conversely, increased fracturing fluid viscosity leads to a reduction in microfracture quantity and fracture length; low viscosity fracturing fluid is conducive to the formation of longer fractures, while high viscosity fracturing fluid is more suitable for near-wellbore reconstruction.