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SBR process evolved from activated sludge process. Because the long cultivation period of activated sludge process and the treatment effect can not meet the needs of production and life, SBR process and related variant improved process came into being. Since the 21st century, with the development of automatic control technology, SBR process has become a widely used technology. This paper introduces the SBR technology and the related improvement process, and puts forward suggestions for the development of SBR Technology in the field of sewage treatment.