The invention provides a computer coaxial dual-oar automatic dedusting cooling fan. The cooling fan comprises a dual-shaft motor, a cooling shaft, spiral blades, connecting rods, a shaft cover, a reducer, a brush, a supporting rod, a dedusting disc and a driving shaft, the cooling shaft is assembled at the upper end surface of the dual-shaft motor, the shaft cover is assembled at the upper end surface of the cooling shaft, the spiral blades are arranged at the outer surface of the cooling shaft, the left ends of the connecting rods are fixed to the upper end of the inner surface of an installation cylinder, and the right ends of the connecting rods are fixed to the upper end surface of the shaft cover. Through the design, the problem that an original cooling fan is poor in cooling effect is solved, the reducer is assembled at the lower end surface of the dual-shaft motor, the upper end of the driving shaft is assembled inside the reducer, the lower end of the driving shaft is fixed to the upper end surface of the dedusting disc, the left end of the supporting rod is installed at the outer surface of the dedusting disc, and the brush is assembled at the right end of the supporting rod. The problem that the service life of the original cooling fan is shortened since the cooling fan is often dismantled to remove dust is solved. The computer coaxial dual-oar automatic dedusting cooling fan is compact in structure, good in cooling effect, excellent in dedusting effect, and long in service life.