Centrifugal fan with purification system

The invention belongs to the field of centrifugal fans, and discloses a centrifugal fan with a purification system, which is used for solving the problem that the air inlet rate of the existing centrifugal fan is reduced along with the increase of service time. The device comprises a damping base and a shell installed above the damping base and used for the centrifugal fan, the shell is provided with an air inlet, a first spiral pipeline, a second spiral pipeline, an air outlet pipeline and an air outlet which are sequentially communicated from the side wall to the top of the shell, the bottom of the second spiral pipeline is located below the bottom of the first spiral pipeline, and a filter screen is fixed to the air inlet; mounting frames mounted on the shell are arranged on the two sides of the filter screen, and a cleaning brush abutting against the filter screen is mounted between the two mounting frames; the bottom of the second spiral pipeline is provided with a storage channel extending to the side w