Abstract: Sodium hypochlorite generator is a device that produces sodium hypochlorite disinfectant by electrolysis of edible salt or industrial salt solution. The Hygienic Requirements for Sodium Hypochlorite Generator (GB 28233-2020), which replaced the Safety and Hygienic Standard for Disinfection by Sodium Hypochlorite Generator(GB 28233-2011), was issued by the State Administration for Market Regulation and the Standardization Administration of China on April 9, 2020 and was implemented on November 1, 2020. The new standard specifies the main components requirements, technical requirements, application range application method, inspection method, transport, storage, package and label, nameplate and instruction manuals of sodium hypochlorite generator. This article interprets and explains the background, principles, and details of the revision of this standard.