The invention provides a leachate processing device based on domestic refuse landfilling. The leachate processing device based on domestic refuse landfilling comprises an extruding mechanism, a storage mechanism, and supporting legs; the extruding mechanism is fixedly arranged on the upper end surface of the storage mechanism; the supporting legs are fixedly arranged at the four corners of the lower end surface of the storage mechanism; the extruding mechanism comprises an upper cover plate, a spacing board, a left blocking plate, a filter screen, a screw rod, an extruding plate, a nut seat, arotating disc, a connecting rod, roll balls, a protection box body, and a telescopic plate; the storage mechanism comprises a supporting plate, a storage box body, a liquid outlet pipe, a filter core, a sealing cap, an opening groove, a locking bolt, a rotating plate, a slide groove, a positioning block, a floating plate, a guide bar, and a groove. Compared with the prior art, the beneficial effects are that, domestic refuse can be pressed into blocks, so that leaching speed is accelerated, it is convenient for processing of waste liquid, and observing on content, and discharge effect is improved.