The invention relates to the technical field of deep treatment and recycling of sewage and particularly relates to a device for treating and recycling aquaculture water and a treatment method. The device comprises a baffle deep-bed filtering tank system and a fault seepage reoxygenation nitration bed, wherein a water outlet of the baffle deep-bed filtering tank system is connected with a water inlet of the fault seepage reoxygenation nitration bed through a pipeline; the baffle deep-bed filtering tank system comprises at least one independent baffle deep-bed filtering tank; a water inlet and awater outlet are respectively formed in positions at the same height on two sides of the baffle deep-bed filtering tank system. The water quality indexes are monitored after the water is treated by the device; the pH is controlled to be 7.8-8.2; the content of ammonia nitrogen is less than 0.3mg/L; the content of nitrite is less than 0.1mg/L; the content of dissolved oxygen is not less than 4.0mg/L; the growth requirements of the aquaculture animals can be met, so that the aquaculture water can be deeply treated and recycled.
; 张宇轩
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