The invention relates to a kitchen garbage pusher. A pusher guide rail is arranged on the lower face of a pusher body, a pusher sliding block is mounted on the pusher guide rail, and the pusher pushes and extrudes kitchen garbage under the effect of a hydraulic cylinder; a leachate connector of a pusher leachate collection box is connected with a leachate collector pipeline, and after kitchen garbage is pushed and extruded by the hydraulic cylinder, kitchen leachate enters the leachate collection box, and then is drained through the leachate collector pipeline; a hopper is mounted on the pusher body, a hopper shutter box is arranged on the lower portion of the hopper, a shutter capable of being opened downwards is arranged in the hopper shutter box, the shutter is connected with a shutter oil cylinder, the shutter oil cylinder is driven to open the shutter, and kitchen garbage in the hopper slips in the shutter to enter the pusher. The bad smell of the kitchen garbage can be isolated from entering a treatment room, after the kitchen garbage is extruded and compressed, foul water sewer is independently collected and can be directly treated, the bad smell entering the pusher is pumped out through a draught fan, isolation of bad smell and foul water sewer is achieved, and meanwhile manual labor intensity can be greatly reduced.