The invention discloses a preparation method of disperse red 60, and belongs to the technical field of comprehensive treatment of chemical dye byproducts. The preparation method comprises the following steps: by taking 1-aminoanthraquinone as a reaction raw material, adding sulfuric acid and water for bromination and hydrolysis reaction, and then adding phenol into the reaction liquid for condensation reaction to finally obtain a fuel disperse red 60 filter cake. Phenol washing water generated in the condensation reaction process enters a phenol recovery procedure to be subjected to phenol recovery treatment, and the mass fraction of phenol in the phenol washing water is 50%-60%. The phenol washing water generated in the production process of the dye disperse red 60 is recycled, so that the method is a resource treatment method, the production cost is saved, and the environment is protected; and the implementation equipment investment of the process is less. The content of the recovered phenol reaches 95%, the phenol can be used in production, the overall recovery rate of the phenol reaches 95%, and the method has a good application prospect.