It is very important to study the influencing factors of fracture propagation in coal-rock reservoirs to improve the recovery rate of coalbed methane. In order to explore the influence of different perforation spacing-dip angles on the fracture propagation law of deep coal and rock, the discrete element analysis method was used to study the influence of perforation spacing-dip angle on the expansion form and extension range of fracture network by considering the stress change characteristics of coal and rock around the well, the maximum circumferential stress criterion, the original reservoir and other conditions. The simulation results show that with the change of perforation spacing from 40 mm to 100 mm, the number of cracks is the largest when the spacing is 60 mm. When the perforation inclination angle varies from 15° to 60°, when the perforation angle is 45°, the seam mesh morphology is the most complex. That is, when the perforation spacing is 60 mm and the perforation inclination angle is θ=45°, the morphological complexity of the fracture network of hydraulic fractures increases significantly, and the expansion range of the fracture network is the largest. Through the verification of Well Y-1 in Shenfu North Papaya District, the prediction results are consistent with the measured data, which proves the correctness of the numerical model of coal and rock.