Wastewater treatment device

The utility model discloses a wastewater treatment device and relates to the related technical field of wastewater treatment. The wastewater treatment device comprises a treatment tank and a wastewater treatment assembly, wherein the wastewater treatment assembly is fixedly connected to the interior of the treatment tank; the wastewater treatment assembly comprises a first inclined surface water cutting-off plate, a second inclined surface water cutting-off plate, a biological filter material and a positioning base material, the first inclined surface water cutting-off plate, the second inclined surface water cutting-off plate, the biological filter material, the activated carbon bag and the positioning base material are sequentially arranged in the treatment tank from top to bottom, and a sewage discharge groove is formed in the middle of the inclined surface of the first inclined surface water cutting-off plate; a rod-shaped filter screen is fixedly connected to the middle position of the sewage discharge g