The invention, which discloses an interior ceiling type air purifier, belongs to the technical field of environmental protection. The interior ceiling-type air purifier, which comprises a power supply, net air intakes, a top board with installing holes, an ultraviolet lamp, a photocatalyst filter, an HEPA filter, an active carbon filter, a support, blower fan blades, a protective cover and a motor, is utilized to solve the problem of interior high-density foul air purification. After the air purifier provided by the invention starts up to operate, the foul air is drawn into the air intakes for primary filtering and sterilized by the ultraviolet lamp and the photocatalyst filter; then the sterilized foul air passes through the HEPA filter, and pollutants whose diameters are larger than or equal to 0.03 micrometers are filtered by the HEPA filter with the filtration efficiency being 99.9%; finally, the air passes through the active carbon for the adsorption of peculiar smell and harmfulgases, and the purified air is vertically blown downwards. Therefore, a virtuous air cycle is generated indoors during the process and the air is efficiently purified to achieve the purpose of air purification. The interior ceiling-type air purifier provided by the invention has advantages of low use cost, wide application range, remarkable effects, thorough air purification and large practicality.