Novel aquaculture tail water treatment system

The utility model discloses a novel culture tail water treatment system, which comprises a culture pond, a settling barrel, a water pump, a sand filter tank and an ultraviolet sterilization chamber, a water outlet at the bottom of the culture pond is communicated with a water inlet pipeline at one side of the upper part of the settling barrel, and a water outlet at the other side of the upper part of the settling barrel is communicated with a water inlet pipeline of the water pump; a water outlet head of the water pump is communicated with the sand filter tank through a pipeline, the sand filter tank is communicated with the ultraviolet sterilization chamber through a pipeline, and the ultraviolet sterilization chamber is communicated with the culture pond through a return pipe through a pipeline; the water flow rotates in the settling barrel to settle large particles and is filtered by the sand filter tank, so that the treatment effect is ensured, the equipment use cost is greatly reduced, the occupied space