The invention belongs to the technical field of masks, and in particular relates to an anti-bacterial protective mask. The anti-bacterial protective mask comprises a mask body, filters are erected onthe side surfaces of the mask body, an embedding ring is placed inside each filter in an embedding manner, a filtering bag is placed inside each embedding ring, hanging ropes are sewn to the two endsof the mask body, the mask body comprises non-woven fabrics and first filtering cotton, two layers of non-woven fabrics are arranged, and the first filtering cotton is laid inside the non-woven fabrics; and latex plates are additionally arranged on the side surface of the device, sealing cotton is arranged on the inner-side surfaces of the latex plates, when the mask body is fixed on the face of auser, the latex plates promote the contact tightness of the mask body with the face, the sealing cotton is used for blocking the gap of the side face of the nose bridge of the user, during the use process of the filters, second filtering cotton is used for filtering air, so that the dust content in the air is reduced, due to active carbon, the foreign smell in the air is reduced, and due to sterilizing layers, bacteria are killed.