A ferrocene carboxylic acid (Fc)-doped copper-p-phthalic acid metal-organic framework material (Fc-Cu PTA) exhibited remarkably high peroxidase-mimicking activity, while Cu PTA showed nearly no peroxidase-mimicking activity. Under the enzymatic catalysis of Fc-Cu PTA as a peroxidase-mimicking nanozyme, the tested organic dyes were rapidly degraded by peroxymonosulfate. Fc-Cu PTA could be an effective catalyst for the degradation treatment of dye-polluted water and soil sources, and potentially for other peroxidase-related applications as well. A ferrocene carboxylic acid-doped copper-p-phthalic acid metal-organic framework material (Fc-Cu PTA) as a nanozyme exhibited high peroxidase-mimicking activity for catalytic dye degradation, while Cu PTA showed nearly no peroxidase-mimicking activity.