The present invention relates to an antifouling film and its construction method for water quality management of an adjacent intake pump facility. To this end, a plurality of files that are inserted perpendicular to the sea floor to a certain depth, spaced apart from each other by a certain distance; A buoy configured to interconnect the files, the buoys configured to move in the longitudinal direction of the file according to the water level; A barrier that blocks the suspended matter in the sea water, is connected to the pile and is fixed in the vertical direction of the pile, and configured to be at least longer than the depth of the MLSLS; And a weight configured to be provided at a lower end of the protection film to apply a load to the protection film.
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