Abstract: Inorganic modified bentonite prepared by inorganic compounds was used in the pretreatment of monosodium glutamate (MSG) wastewater to recover organic matters.The effects of the kinds and dose of activator and coagulation and the dose of modified bentonite on the removal rate of CODCr and organic matters such as glutamic acid bacteria were studied.The adaptability of the method to the monosodium glutamate wastewater was also studied.Results showed that inorganic modified bentonite prepared by 7.5 mg/g Na2CO3 and K2HPO4 had good treatment effects.When combined with 20 mg/L sodium polyacrylate on the treatment of high-concentration monosodium glutamate wastewater,it had CODCr removal rate of 58.2% and glutamic acid bacteria removal rate of 87.6%.It could also recover the deposit with about 0.468 single cell protein (SCP).