The invention relates to a fluidized selective deslagging device, belonging to the field of thermal engineering equipment. The device comprises an air distributor, air hoods, a bed deslagging channel and a hearth enclosure structure, and is characterized in that the air distributing plate is inclined towards the bed deslagging channel which is arranged on the lowest point of the air distributing plate; the air hoods are directional air hoods and are arranged staggeredly; and the bed deslagging channel is a step channel. The area of the air inlet section of each directional air hood is larger than the area of the air outlet section, the width of the air inlet section is larger than the height of the air outlet section, and an inclined angle theta on the air outlet section is 5-20 degrees. More than two bed deslagging openings can be arranged in parallel in a horizontal direction. The invention adopts the mode of fluidized bed deslagging; under the action of the inclined air distributing plate and the directional air hoods, the invention can selectively deliver large blocks of non-flammable substances to the deslagging opening, and then smoothly discharges the substances out from the hearth, thereby realizing the stable and normal running of a garbage incinerator; and the flushing to the air hoods, which is carried out by the inlet of air and materials, can be reduced by the alternative distribution and the unequal section arrangement of the directional air hoods, and the service life of the deslagging device can be prolonged.