Method for processing acetaminophen refined mother liquid

The invention discloses an energy-saving environment-friendly method for processing acetaminophen refined mother liquid, comprising the following steps: removing inorganic salt in the mother liquid by carrying out electrodialysis method processing or ion exchange resin processing on acetaminophen refined aqueous mother liquid and lowering the electrical conductivity of the mother liquid below 300 mus/CM; and using the acetaminophen refined aqueous mother liquid processed by desalting for refining an acetaminophen crude product again. The acetaminophen refined aqueous mother liquid processed by the method can be recycled, and acetaminophen contained in the mother liquid needs not to be separated out; compared with a technology for processing the mother liquid in the prior art, a concentration process is removed, and a large number of energy resources are saved; and because impurities which are carried in the mother liquid and are concerned to the acetaminophen have consistent sources and properties with impuri