A grinding plate for a floor grinder is provided to facilitate replacement of the grinding plate in the long term usage process of a floor grinder and to prevent material waste and unnecessary loss. A grinding plate(20) for a floor grinder comprises a coupling unit(21) and a grinding tool(22). The coupling unit couples a grinding plate with a rotary shaft of the grinder main body. A plurality of grinding tool are bole-coupled to the lower surface of the grinding plate.
