BiFeO3　magnetic　nanoparticles　(BFO　MNPs)　were　prepared　with　a　sol-gel　method　and　characterized　as　a　catalyst.　It　was　found　that　BFO　MNPs　effectively　catalyzed　the　decomposition　of　H2O2　into　center　dot　OH　radicals,　being　confirmed　with　electron　spin　resonance　spin-trapping　technique　and　other　radical　probing　techniques,　The　strong　H2O2-activating　ability　of　BFO　MNPs　showed　promising　applications　in　the　oxidative　degradation　of　organic　pollutants.　When　BFO　MNPs　were　used　as　a　heterogeneous　Fenton-like　catalyst　to　degrade　Rhodamine　13,the　apparent　rate　constant　for　the　RhB　degradation　at　25　degrees　C　at　pH　5.0　in　the　BFO　MNPs-H2O2　system　was　evaluated　to　be　2.89　x　10(-2)　min(-1),　being　about　20　folds　of　that　obtained　with　Fe3O4　MNPs　as　the　catalyst　under　similar　conditions.　Moreover,　BFO　MNPs　were　demonstrated　to　have　excellent　stability　and　reusability.　The　catalytic　mechanism　of　BFO　MNPs　was　also　investigated　with　Monte　Carlo　simulations　and　density　functional　theory　calculations.