Abstract: The present application relates to the field of pesticide chemical industry technology, and discloses a post-treatment method for a saflufenacil-containing reaction solution. The post-treatment method includes the following steps: (1) after phase separation of a saflufenacil-containing reaction solution, performing desolvation treatment on an organic phase, and then adding a first organic solvent for stirring; (2) after the stirring is completed, performing filtration, leaching an obtained filter cake with a second organic solvent, and obtaining saflufenacil after drying. The post-treatment method provided by the present application can simply and efficiently treat the saflufenacil-containing reaction solution, with a product yield of over 90% and a content of about 98%.