The utility model discloses a delivering system for aluminum oxide. The delivering system for aluminum oxide comprises a pneumatic chute and a discharging port. The discharging port is connected with the pneumatic chute. The peripheral wall of the discharging port and the edge of the corresponding wall face of the pneumatic chute are spaced. According to the delivering system for aluminum oxide, due to the fact that the size of the discharging port is reduced, the area of a non-fluidization area is reduced. Therefore, the problem that the pneumatic chute is blocked is effectively solved and smooth delivery of the pneumatic chute is guaranteed.