Cultivation work ship circulating water treatment system

The utility model belongs to the technical field of cultivation seawater treatment, and particularly relates to a cultivation work ship circulating water treatment system. Comprising a grid and a sodium hypochlorite generator for generating a sodium hypochlorite solution, and disinfected seawater is boosted by a seawater booster pump; seawater sequentially passes through the grating to intercept large substances, the sodium hypochlorite generator is used for killing microorganisms, bacteria, viruses and the like in the seawater, the cyclone desander is used for removing fish, shrimps, mud, sand and the like, the sand filter is used for removing most suspended solids, and the ultrafiltration membrane filter is used for filtering the suspended solids. The automatic backwashing filter is used for removing residual suspended particles, the activated carbon filter is used for intercepting macromolecular organic matters, colloids, residual chlorine, carbon dioxide, hydrogen sulfide, viruses, heavy metal ions and th