The invention belongs to the field of air purification and discloses a water circulation air purifying device. The water circulation air purifying device comprises a water through pipe and a ventilation duct. The water through pipe is communicated with the ventilation duct. A closed ring is formed by the water through pipe and the ventilation duct. A draining board is arranged inside the water through pipe and fixed to the water through pipe. A plurality of through holes are formed in the draining board. A filter net is arranged below the draining board. An electric heating pipe is arranged inside the ventilation duct. A collection box capable of being extracted is arranged above the electric heating pipe. An air guiding fan and a condensation pipe are further arranged inside the ventilation duct. According to the water circulation air purifying device, the problem that a filter net is likely to be damaged due to the fact that the filter net needs to be taken out to be cleaned is solved, and meanwhile water can be recycled.