Tanning wastewater treatment device

The utility model discloses a tannery wastewater treatment device which comprises a treatment box and a purification box, a cover body capable of being freely opened and closed is arranged at the top of the treatment box, a wastewater inlet pipe is arranged on the cover body, a water distribution plate is arranged in the treatment box, a biological membrane filler is arranged below the water distribution plate, and the purification box is arranged below the biological membrane filler. The periphery of the periphery of the biological membrane filler abuts against the inner wall of the treatment box, the biological membrane filler is hung on the treatment box through a hanging basket, an aeration pipe is arranged at the inner bottom of the treatment box, a plurality of aeration heads are installed on the aeration pipe with an upward opening, a heating element is laid at the bottom of the treatment box, a first exhaust pipe is arranged on the cover body, and a second exhaust pipe is arranged on the cover body. T