During the CBM (Coal Bed Methane) drainage and development of pulverized coal seam blocks, the coal matrix is relatively fragmented, which easilyleads to the settlement and accumulation of coal fines during the fracturing process. Conventional fracturing fluids are difficult to effectively control the production of coal fines, and may also cause adverse consequences such as fracture plugging, resulting in fracturing failure. To address the above issues, this paper proposes a technical scheme of using fiber fracturing fluid for fracturing in pulverized coal seams. Fiber fracturing fluid has a good carrying capacity, which can increase the placement distance of proppants and simultaneously distribute coal fines evenly in fractures, thus ensuring the fracture conductivity. Firstly, a coal fine particle settlement experiment was carried out to evaluate the coal fine capture effect of fibers. Then, considering the mechanical properties of fibers, models of fracturing fluid hydrodynamics, particle kinematics and fiber dynamics were established to study the multiphase flow laws of fiber fracturing fluid, coal fines and proppant particles, and reveal the movement law of fiber intercepting coal fines. Finally, the effects of fiber concentration, sand placement concentration and injection rate of fracturing fluid on the control of coal fine migration were simulated. Research findings indicate that analyzing the resistance changes of coal powder aggregates with different particle sizes in guar gum fracturing fluids has determined the optimal fiber addition range to be 0.08%–0.12%. This study provides reference for coal seam fracturing and other formations such as water-sensitive shale fracturing.