In order to obtain Andrias davidianus peptides with high antioxidant activity,combined- enzyme( flavourzyme and neutral protease) is selected to hydrolyze Andrias davidianus muscle.The degree of hydrolysis was obtained,up to 44.12%.The extraction rate of Andrias davidianus peptides was about 90.28%.The hydrolysate was separated into 5 peptide parts by ultrafiltration membranes with 20,5,2,0.3 ku respectively,the DPPH·,·OH,and O-2·scavenging ability of the different parts were studied respectively.The result...