The extraction of flavone from Lespedeza daurica and its oil antioxidation were studied.Base on single factor experiment,the optimum extracting technology of flavone from L.daurica was determined by using L16(45) orthogonal test.The optimal parameters were as follows:the alcohol concentration of 50%,extracting at 70 ℃ for 1.5 h,material-liquid ratio of 1∶20.I2-Na2S2O3 titration method was used to deter mine the inhibition of total flavonoids from L.daurica on the oxidative rancidity of lard,rapeseed oil and...