Leachate treatment device suitable for refuse landfill

The utility model discloses a leachate treatment device suitable for a refuse landfill. The leachate treatment device comprises a drainage well and a leachate device, the drainage well comprises an outer cylinder and an inner cylinder; two drainage pipe connecting pipes with different inner diameters are fixed on the blind plate; the two drainage pipes are respectively a gas drainage pipe and a liquid drainage pipe; the percolate device is communicated with the liquid drainage guide pipe through a circulating pipeline so as to convey percolate into the drainage guide well or reflow the percolate into the percolate device; and a filter screen is arranged in the leachate device. The filter screen is installed in the middle of the percolate treatment device, the percolate tank is divided into the upper tank body and the lower tank body through the filter screen, the lower tank body serves as a connecting portion of the percolate drainage pipe, the upper tank body serves as a connecting portion of the percolate b