Air purifier with humidification function

The utility model provides an air purifier with the humidification function. The air purifier comprises an air flue, a centrifugal fan and a filter. The air flue comprises an inner air duct and an outer air duct. The inner air duct is sleeved with the outer air duct. An air inlet is formed in an upper portion orifice of the inner air duct. An air outlet is formed in a region between the upper end of the outer air duct and the upper end of the inner air duct. The centrifugal fan is located on a lower portion orifice of the inner air duct. The outer air duct surrounds the centrifugal fan. The filter is located in the inner air duct. A plurality of first fan blades are arranged on the upper surface of a basal disc in the centrifugal fan, a plurality of second fan blades are arranged on the lower surface of the basal disc, and a water storage box is arranged below the second fan blades. The second fan blades are matched with the first fan blades to form negative pressure blow the second fan blades and the first fan blades, water steam generated in the water storage box is taken away under the effect of the negative pressure, the effect of humidifying air is achieved, the purification function of the composite air purifier is enriched, and the purification effect is optimized.