The invention discloses a movable type dung, urine and flushing water separation system for a pigsty of a large-scale pig farm and a dung dry removal technology method. The movable type dung, urine and flushing water separation system for the pigsty of the large-scale pig farm comprises a movable type dung receiving and separation bed rail trolley, a horizontal rail, a liquid collecting ditch, a dung removal scraper blade and a pig dung spiral conveyor, wherein dung and flushing water in the pigsty fall to the inclined bed surface of the movable type dung receiving and separation bed rail trolley through the slatted floor of the pigsty, separation between the dung and liquid is carried out in real time, the liquid automatically flows into the liquid collecting ditch and a sewage collecting pool, the pig dung left on the bed surface of the movable type dung receiving and separation bed rail trolley is scraped to a feeding inlet of the pig dung spiral conveyor through the dung removal scraper blade, and is conveyed to a dung transport vehicle or a dung storage field through the pig dung spiral conveyor, and the manpower or mechanical power reciprocating mode or the manpower or mechanical power vertical alternate mode or the piston pushing intermittent movement mode is adopted for movement of the movable type dung receiving and separation bed rail trolley. The movable type dung, urine and flushing water separation system for the pigsty of the large-scale pig farm and the dung dry removal technology method can solve various problems of an existing dung dry removal technology method for pigsties and various problems in the existing process of separation between dung and liquid.