The subject innovation relates to a laminated film-base grinding device. The subject innovation are laminated in the film-base polishing apparatus, the first rotation is at least arranged having one or more sequentially remove the foreign matter adhering to the film-base bottom surface of the predetermined area to be transferred to the upper surface during the rotation brush; The first conveyor at an upper side of the first rotating brush which is thereby compressed into close contact with the surface to an upper surface of the film-base and transferring the film-base; Second conveyor on the outer side of said first rotating brush which is thereby transported to support the lower surface of the film-base which is conveyed through the first conveyer; The second secondary rotation to remove the top surface of the foreign material being transported during film-base arranged having at least one or more rotating brushes at the upper side of the conveyor and; It characterized in that it comprises a; a nozzle provided in the distal end portion is installed on the film-base outlet-side open area of ​​said first rotating brush water injector is to prevent downward bending of the film-base due to friction heat by spraying water on the film-base do.