Aquaculture water circulation purification method and device

The invention discloses an aquaculture water circulation purification method. The method comprises the following steps: by utilizing a circulating water pump, pumping aquaculture water in an aquaculture pond into a protein separator to carry out protein separation, wherein the ozone accounting for 20% to 30% of the total required ozone quantity is added when the water is pumped into the protein separator; enabling the aquaculture water treated by the protein separator to overflow into a biological mechanical filter to carry out mechanical filtration and biological decomposition; enabling the aquaculture water filtered by the biological mechanical filter to overflow into a disinfection treater to carry out secondary ozone treatment, wherein the ozone accounting for 70% to 80% of the total required ozone quantity is added when the water overflows into the disinfection treater; enabling the aquaculture water treated by the disinfection treater to overflow into an aeration tank to remove the ozone and other harmful gas; and enabling the aquaculture water treated by the aeration tank to overflow into the aquaculture pond. The method disclosed by the invention has the advantages of being less in land occupation, small in civil engineering quantity, low in cost and energy-saving as well as environment-friendly. Therefore, the method is suitable for the aquaculture.