We adopt a multi-stage shaker + hydrocyclone desander / desilter + centrifuge combined separation process, which effectively removes drill cuttings, sand, and micro solids from the mud. The system also monitors and adjusts key parameters such as density, viscosity, and fluid loss in real time. Through an automatic chemical dosing unit and mixing hopper, bentonite, polymers and other additives can be quickly replenished, ensuring the performance of recycled mud is close to that of fresh mud, thus meeting the requirements for reinjection into the borehole.