In order to determine phytic acid content in wheat bran, it was extracted with hydrochloric acid under the assistance of ultrasonic. The extraction conditions of phytic acid were optimized through single-factor and orthogonal tests. The results showed that the best extraction process was as follows;extracting wheat bran with 0.8 mol/L hydrochloric acid in 50 ℃ water bath for 1.5 h under the assistance of ultrasonic treatment at 700 W and 20 to 25 kHz for 15 min. Compared with non-ultrasonic method, the extr...