Abstract:The antioxidant activity of the enzymatic products of silkworm pupa powder were studied by four common in vitro antioxidant models such as DPPH·scavenging activities，O2-·scavenging activities，reducing ability and metal ion chelation ability.Neutral protease，acid protease，papain，kiwi protease，flavor protease，complex protease，alkaline protease and bromelain were selected for seperately enzymatic hydrolysis to obtain the enzymatic hydrolyzed product.The comprehensive antioxidant capacity of alkaline protease hydrolysates was better，for its DPPH·scavenging rate was 38.91 %，O2-·clearance rate was 43.69 %，reducing ability was 1.982，and metal ion chelation ability was 0.624.