Separation method of benzenediol reaction liquid

The invention provides a separation method of benzenediol reaction liquid, which comprises the following steps: vaporizing the benzenediol reaction liquid to form first vapor phase condensate, vaporization residual liquid and first cold neck collecting liquid, performing vapor stripping on the vaporization residual liquid with vaporous phenol to form second vapor phase condensate, vapor strippingresidual liquid and second cold neck collecting liquid, and performing rectification on the first vapor phase condensate and the second vapor phase condensate to separate phenol, pyrocatechol and hydroquinone. According to the method, the reaction liquid is vaporized; tar and a catalyst are separated from phenol and benzenediol; the temperature is lower; a deterioration loss of a material is reduced; phenol is used for the vapor stripping; residual benzenediol in the tar is extracted; a content of benzenediol in the discharged tar is greatly reduced; and a lower carry-off loss is achieved under the condition of the lo