The invention discloses a fresh water purifying and water circulation culture facility. The fresh water purifying and water circulation culture facility comprises a pond. A water treatment device is arranged at one end of the pond, a plurality of water separating walls are arranged in the pond and divide the pond into culture water channels composed of a plurality of water flow channels, and a feeding and salvaging boat is arranged in one culture water channel. The feeding and salvaging boat comprises a boat body, a roller mechanism capable of salvaging pond suspended matter is arranged at the front end of the boat body, a feeding device is arranged at the rear end of the boat body, an ejecting device capable of ejecting materials in a feeding tray out of a discharging seat is arranged on an installation plate, and a scraping plate mechanism capable of concentrating materials at the front end of the feeding tray to the rear side of the feeding tray is arranged on the ejecting device. The fresh water purifying and water circulation culture facility aims at overcoming defects in the prior art, and is simple in structure, capable of effectively ensuring the water oxygen content and the good water quality condition, good in culture effect, good in feed dispersity in the feeding process and wide in feeding range.