This purifier utilizes the technology of probiotic disinfection and adsorption filtration to purify the air. Firstly, the probiotic solution is dispersed in every corner of the room by spraying, and then the air is circulated through the basic purification function that can adsorb and filter allergens, formaldehyde and other harmful substances, so as to eliminate bacteria, viruses, allergens and other harmful substances and purify the air in an all-round way.