Treatment method of waste fluid generated in preparation process of solvent red 135

The invention provides a treatment method of waste fluid generated in the preparation process of solvent red 135, and belongs to the field of wastewater treatment. The waste fluid generated in the preparation process of the solvent red 135 contains a lot of hydrochloric acid, ethyl alcohol, a small number of catalysts and unreacted tetrachlorophthalic acid and 1, 8-diaminonaphthalene hydrochloride, the waste fluid is cooled, so that the tetrachlorophthalic acid and the 1, 8-diaminonaphthalene hydrochloride are separated out, the waste fluid is filtered, filtering liquid is decolorized by activated carbon, the decolorized filtering liquid can be applied, and the tetrachlorophthalic acid and the 1, 8-diaminonaphthalene hydrochloride are treated and recycled to obtain tetrachlorophthalic acidand 1, 8-diaminonaphthalene which can continue to serve as raw materials for preparing the solvent red 135.