In order to study the cutting performance of the bolter miner drum in the semi coal-rock roadway, the hardness coefficient f6.5 coal-rock was established by EDEM, and the simulation and analysis were performed on the drum cutting of coal-rock at various cutting thickness and traction speeds，and the coal mine cutting test was carried out for verification. The cutting process of the drums at different working conditions was obtained through simulation experiment. The effects of cutting thickness and traction speed on the cutting performance of the drums were studied and the cutting performance of the drums was evaluated by using the cutting force and its fluctuation coefficient, cutting-ratio energy consumption, and the flatness of the cutting coal-rock wall. The research findings reveal that the drum's cutting resistance undergoes an initial increase, followed by a stabilization phase, as the feeding process advances, and the cutting resistance of the drum fluctuates within a defined range. The coal mine cutting test proves that the simulation results are highly reliable. The cutting force of the drum and the traction speed have a direct and positive correlation, and the fluctuation coefficient and as the traction speed increases, the cutting-ratio energy consumption exhibits a downward trend. The regression equations of cutting resistance, torque and specific energy consumption are obtained by fitting by least squares method, respectively With the increase of traction speed, the flatness of cutting coal-rock shows a trend of first rising and then decreasing, and the larger traction speed is more likely to cause the rock ridge phenomenon at the junction of drum and reducer, which leads to low propulsion efficiency and affects the excavation and anchoring work. When evaluating the cutting performance, the flatness should be given priority; The second is the cutting resistance and its fluctuation coefficient; Finally, it is used as a measure of the cutting-ratio energy consumption of the drum cutting performance.