Lead-containing wastewater treatment device

The utility model discloses a lead-containing wastewater treatment device, including a pre-treatment lead removing groove, a regulating reservoir and a pipe, wherein the pre-treatment lead removing groove is connected with the regulating reservoir by the pipe; the lead-containing wastewater treatment device is characterized by further including a coagu-flocculation reaction tank, a sewage collection tank, a biochemical treatment unit, a secondary sedimentation tank, a biological aerating filter and a sludge storage tank, wherein the regulating tank, the coagu-flocculation reaction tank, the sewage collection tank, the biochemical treatment unit and the secondary sedimentation tank are sequentially connected; a water outlet is arranged on one side of the upper part of the biological aerating filter, and communicates with one side of the lower part of the biological aerating filter; a water outlet is arranged on one side of the upper part of the biological aerating filter; a sludge outlet is arranged on one side of the lower part of the secondary sedimentation tank, and the sludge outlet is divided into two paths, wherein one path is connected with the top of the sludge storage tank while the other path turn back to be connected with the inlet of the biochemical treatment unit by the pipe.