Dyeing wastewater treatment method

The invention discloses a dyeing wastewater treatment method. The dyeing wastewater treatment method is performed according to the following steps: (1) enabling dyeing wastewater to enter a 800T/d raw water regulating pool after grid treatment, uniformly stirring the dyeing wastewater through an oxygen increasing pump in the raw water regulating pool, and reducing the water temperature to obtain A water; (2) enabling the A water to enter a 100T/d primary air floating tank, and then adding ferrous hydrochloride with the weight being 0.17% to 0.19% of that of A water for pretreatment so as to obtain B water; (3) enabling the B water to flow in two biochemical pools respectively, reducing the flow rates of the biochemical pools, prolonging the standing time so as to obtain sufficient biochemistry, and precipitating in a sedimentation basin after biochemistry so as to obtain C water; and (4) enabling the C water to enter a 100 T/d secondary air floating tank, and then adding aluminum silicate with the weight being 0.03% to 0.06% of that of the C water so as to reach the standard of nanotube emission. According to the dyeing wastewater treatment method, the cost of pharmaceutical treatment can be greatly reduced, the effluent concentration can be reduced, and the method is beneficial for environmental protection.