The invention relates to a method for preparing
thiocyanate and
sulfate by utilizing desulfuration waste liquor in a
coking plant, which comprises the following steps of: preparing saturated solution of
copper sulfate, mixing the saturated solution with desulfuration waste liquor, and heating and stirring; performing
solid-liquid separation to obtain a
solid and
sulfate liquid; adding aqueous alkali into the
solid, heating at the temperature of between 50 and 98 DEG C, and stirring and reacting for 10 to 120 minutes; performing solid-liquid separation on
slurry obtained by heating; concentrating the obtained liquid, and freezing for crystallizing and
drying to obtain a high-purity
thiocyanate product; calcining the obtained solid, adding solution of
sulfuric acid, and stirring to produce the
copper sulfate for circular use; adding
activated carbon into the sulfate liquid, and aerating and oxidizing to purify sulfate; and concentrating the sulfate, and crystallizing and
drying to obtain a high-purity sulfate product. The method solves the problem of
pollution of the desulfuration waste liquor to the environment, and simultaneously, pollutants can become value products through the production of the high-purity
thiocyanate product and the high-purity sulfate product.