The invention relates to a rotary high-efficiency biological filter for circulating water cultivation, which is characterized in that the rotary high-efficiency biological filter for circulating water cultivation is provided with a water pump, wherein an outlet of the water pump is communicated with an inlet of an ejector, and an outlet of the ejector is communicated with an inlet of a pressure stabilizing cavity; an outlet of the pressure stabilizing cavity is communicated with a rotary chamber, and the bottom in the rotary chamber is provided with a water flow rotary lug boss; a rotary channel is arranged on the wall on the lower part of the rotary chamber; a water outlet is arranged on the side wall on the upper part of the rotary chamber, and the outside of the water outlet around therotary chamber is provided with an annular settling chamber and a foam collecting chamber which are communicated through the upper part of an annular baffle plate; the annular baffle plate is provided with an opening which is connected with a clean water tank through a pipeline; and the lower part of the settling chamber and the lower part of the foam collecting chamber are communicated with a sewage tank through a pipeline and a valve respectively. The rotary high-efficiency biological filter for circulating water cultivation can greatly improve the content of dissolved oxygen in water, simultaneously increases the specific surface area and generates a stable biomembrane due to high-speed rotating filter materials, effectively purifies the water quality, and can greatly improve the watertreatment effect.