Photo-catalytic multifunctional air clean fan comprises by turns initial filter net, first class blade, strong absorption filter layer, humidification layer, catalytic cleaning layer contented light source, active carbon resistant layer, second blade, resistance wire heating layer and shutter-type wind guiding layer. The motor connects and drives with first and second blades, wherein, the former generates positive pressure to push air forward and penetrate all clean layers and the latter is just opposite; besides, the photo-accelerating agent layer uses glass fiber carried accelerating agent to coat the ring light source structure, add cold-air leading cover on front of air inlet. It makes good use of source beam, cleans air flow, kills virus and bacteria in air, fits to north and south and four seasons; the structure is simple and easy to realize.