The invention discloses a garbage cleaning device used in a kitchen sewer. The garbage cleaning device comprises a water tank, a start button, a treatment tank, a blow-down tube, a bottom tank, a tank opening, a fan, a motor, a connecting hole, an air tube connecting hole, a wiring tube, a crushing wheel, a lifting rod, a sliding sleeve, a moveable rod, a push rod, a storage box, a rotating disc and a connecting rod. The garbage cleaning device has the beneficial effects that the treatment tank is mounted at the bottom of the water tank, the air tube connecting hole is formed in one side of the top of the treatment tank, the treatment tank is communicated with the fan through the air tube, garbage inside the treatment tank is blown into the blow-down tube under the air blowing function of the fan, and then a pipeline inside the treatment tank is effectively prevented from blocking. The stirring wheel is mounted inside the treatment tank, a layer of the sliding sleeve is arranged on the inner wall of the treatment tank, the push rod is mounted at the bottom of the treatment tank, garbage is crushed through the crushing wheel, garbage falling on the inner wall of the treatment tank is pushed into the blow-down tube through the sliding sleeve and the push rod, and then the garbage is effectively prevented from being adhered to the inner wall of the treatment tank.