The effects of montmorillonite produced with the semi-dry method on the qualities of soybean oil,sunflower seed oil and rapeseed oil under different bleaching conditions(bleaching temperature,bleaching time and dosage)were investigated to develop an efficient and environmentally friendly bleaching agent for edible oil.The results showed that the bleaching agent(montmorillonite)had the function of adsorbing pigments and peroxides to reduce red value and peroxide value.Compared with oils before bleaching,the red value of soybean oil,sunflower seed oil and rapeseed oil was decreased by 77.4%,92.3...