Single-factor test and L9(34)orthogonal experimental design were used in the study of Rapeseed-meal-sinapine extraction.Sinapine was measured at 388nm spectrometry,OZT was measured by ISO 5504-1983,TITTO was measured by the total phenols,and protein was determined by Kjeldahl's method.Study showed that the primary and secondary factors were: the sample quality,cycles,extraction temperature and extraction time;The optimum conditions were: extraction temperature 140 ℃,static extraction time 15min,3 times extraction,sample quantity 3g.Under the optimum conditions,the dregs of Sinapine yield was 1.8807 %,which was 64.5263% increasing compared to the hot alcohol extraction.The quality of rapeseed meal after ASE extracted was improved.By infrared spectroscopy analysis,it verified that the eigenstructure of sinapine was existed in concentrated freeze-dried extracts.