Screening machine capable of preventing screening holes from being blocked and used for bio-organic fertilizer

The utility model discloses a bio-organic fertilizer screening machine capable of preventing screening holes from being blocked, which comprises a screening machine frame, a coarse screen mesh cylinder and a fine screen mesh cylinder, and the coarse screen mesh cylinder is connected inside the screening machine frame through a rotating shaft. According to the screening machine capable of preventing the screening holes from being blocked for the bio-organic fertilizer, through mutual cooperation of the screening machine frame, the coarse screen mesh cylinder, the fine screen mesh cylinder, the cleaning brush, the power assembly, the limiting rail, the connecting gear ring, the conversion gear ring, the feeding hopper and the discharging hopper, the rotating motor rotates to drive the coarse screen mesh cylinder to rotate, and under conversion of the conversion gear, the screening hole blocking is prevented. And meanwhile, a conversion gear rotates to drive a cleaning brush to synchronously clean the exterior o