The utility model relates to an anti biological adnexed integrated system in sea of nuclear power station sea water water intaking tunnel, an it is biological to adhere to the sea on the inner wall for suppressing sea water water intaking tunnel that the nuclear power station used, anti biological adnexed integrated system in sea of nuclear power station sea water water intaking tunnel includes before sea water water intaking tunnel is intake that the application is on its inner wall and the antifouling coating that reduces gradually of the function proportion time of following, be connected and intake the back to wherein adding sodium hypochlorite solution and function proportion along with crescent charge device of time at it with sea water water intaking tunnel. Antifouling coating including the polymer cement mortar layer on sea water water intaking tunnel inner wall of coating, the lacquer layer in the middle of that coats on the polymer cement mortar layer, the antifouling layer of low surface energy on the lacquer layer of centre coats. The utility model relates to a combinedly preventing that extra large biology adheres to the scheme, having the advantage of antifouling coating and charge device dual mode simultaneously, the two is mutually supported and to play the better extra large biological adhesion effect that prevents.