Abstract: The three concepts of composition parameter,process parameter and technological parameter were put forward for the first time according to the characteristics and rules of the reaction period in the SBR process in this article in order to analyse deeply the correlativity and relation among these parameters,put forword better process control strategies,estimate the existing state and quantity of the composition parameter according to the variety rule characteristics of the process parameter,control and regulate the technological parameter of the SBR process.Based on the three concepts of composition parameter,process parameter and technological parameter,and on the existing researches,the movable change of COD、DO、ORP and pH curve in the process of the organic pollutant degradation in the SBR process were summarized systematically.The relation between the composition parameter COD and the process parameter DO、ORP、pH and the relation among the process parameter DO、ORP、pH were discussed.The feasibility of making use of DO、ORP、pH to build a fuzzy control system was studied.The above-mentioned research provides theories of the design of the SBR process and its automation control.