The work proposes a method of purifying landfill leachate. The method is based on a combination of physicochemical and membrane methods of water purification with the extraction and removal of the main part of the sediment at the initial stage of the purification process. This approach allows reducing the load on the subsequent stages of purification, including reverse osmosis. The paper presents a technological scheme for landfill leachate treatment and sediment transfer to the solid phase. In the process of work, an experimental stand was created, and research was conducted on the treatment of landfill leachate. The results obtained indicate the effectiveness of the proposed method.