This centrifugal + disc filter adopts a two-stage series filtration structure. The front centrifugal unit efficiently removes large-particle sand and gravel, while the rear automatic backwashing disc unit precisely intercepts micron-level fine impurities, adapting to various complex irrigation water sources and completely solving the emitter clogging problem in drip irrigation systems. The equipment supports fully automatic differential pressure/timed backwashing, requiring no manual maintenance and ensuring uninterrupted water supply during backwashing. It features high filtration accuracy, remarkable water-saving efficiency, aging-resistant and corrosion-resistant materials, and an integrated design for easy installation. As a core filtration device for drip irrigation and integrated water and fertilizer systems, it can significantly improve irrigation uniformity and reduce operation and maintenance costs.