Abstract: Methamidophos production waste water is organic industrial waste water of high concentration and toxicity. It is shown that SBR is an economically effective process used for treating methamidophos industrial waste water. When COD concentration of the influent was 600 to 1200mg/L, the COD and BOD5 concentrations could meet" The Integrated Waste Water Discharge Standard GB 8978-88" after treatment. SBR method has several advantages such as stable efficiency and simple process.