Circulating-water aquaculture system and application thereof

The invention relates to a circulating-water aquaculture system and application thereof, which belongs to field of aquaculture; the circulating-water aquaculture system comprises a culture area, a tail water purification area, wherein, the culture area comprises: crab culture ponds and fish culture ponds; the circulating-water aquaculture also comprises: water-inlet channels and water-outlet channels; the water-outlet channels are arranged both between the crab culture ponds and the tail water purification area and between the fish culture ponds and the tail water purification area, the water-inlet channels are arranged both between the tail water purification area and the crab culture ponds and between the tail water purification area and the fish culture ponds; meanwhile, the water-inlet channels are arranged between the fish culture ponds and the crab culture ponds, the water in the fish culture pond enters the crab culture pond through the water-inlet channel; the advantages of the invention are as follow