The invention provides an ash bucket anti-blocking apparatus for deduster, which comprises a transmission apparatus, a shaft coupling, a driving shaft, a driving wheel, a driven wheel, a rotation ash conveying device, a rotation ash conveying device support, a warehouse wall vibrator and a transmission device support. The transmission device support is fixed at upper part of outer wall of an ash bucket, the transmission device is arranged on the transmission device support, the transmission device is connected to one end of the driving shaft through the shaft coupling, and the driving wheel is arranged at the other end of the driving shaft. the rotation ash conveying device support is fixed on the inner wall of the ash bucket, the rotation ash conveying device is fixed on the rotation ash conveying device support, so that installation can be carried out with minimum safe rotation distance, the driven wheel is arranged on the rotation ash conveying device, and is engaged with the driving wheel, so that synchronous rotation can be realized. While working, the transmission device drives the driving shaft and the driving wheel to rotate through the shaft coupling, and the engaged rotates, thereby the rotation of the rotation ash conveying device can be driven, ash at upper part of the ash bucket moves to the lower opening of the ash bucket, and phenomena of ash covering, ash blocking, bridging and hardening generated in the ash bucket can be effectively prevented.