The invention relates to a police facial mask with replaceable air filters, relating to the technical field of PM 2.5 protective facial masks. The police facial mask comprises a facial mask body, elastic ear belts, plastic nose bars and the air filters, wherein the facial mask body, the elastic ear belts, the plastic nose bars and the air filters are integrally connected to form a polygonal three-dimensional shape with fixed proportion, the fabric of the facial mask body is formed by once heat seal of a polyester fiber fabric, a non-woven fabric and a melt-blow fabric which are capable of resisting three super bacteria including NDM1, H1N1 and MRSA, and the outermost layer of the facial mask body is formed by environment-friendly cotton and polyester fiber; the plastic nose bars are lined to the inner side above the facial mask body, and the sealing effect is good due to the nose attaching design; the air filters are made of a nanometer novel filter material, environment-friendly adhesive tapes attach to the outer surfaces of the air filters, and in wearing, the air filters are adhered to the inner side of the facial mask body, so that particulate matters can be effectively prevented and bacterial viruses can be effectively killed; the air filters are replaceable, so that the filtering effect for the particulate matters can be improved, and the bacterial viruses can be killed; and the demand for protecting various police officers during the rescue and relief work as well as the dispatch and on-duty is satisfied to the greatest extent.