The invention discloses a portable air purifier for resisting haze. The portable air purifier comprises a breathing mask, air filtering devices, an air inlet rhinobyon protection sleeve and an air supply mechanism. The upper end of the breathing mask is connected with the air supply mechanism through a telescopic mechanism. The air supply mechanism comprises an air supply chamber and a driving mechanism arranged in the air supply chamber. The breathing mask is communicated with an inner cavity of a power chamber through a first corrugated pipe, and the pipe diameter of the first corrugated pipe. The air filtering devices are symmetrically arranged at the upper ends of the left side and the right side of the air supply chamber. According to the portable air purifier for resisting haze, thephenomenon that redundant air exists in the breathing mask, and consequently a wearer feels stuffy and damp is avoided, and the phenomenon that the oxygen demand of the wearer is increased in the movement process, and consequently the wearer has difficulty in breathing, and anoxia appears is avoided. Meanwhile, Chinese herbal medicine can be placed in a traditional Chinese medicine box, purified air is absorbed by the human body under the action of the traditional Chinese medicine to achieve the functions of clearing away the lung-heat and wetting the throat and refreshing the wearer and restoring consciousness on the wear, and the characteristics of being good in sealing effect, convenient to carry and safe to wear are achieved.