The invention discloses enzymatically hydrolyzed peptides and an application of the peptides as feed additives for layers. The enzymatically hydrolyzed peptides are prepared through the following steps: preparation of schisandra protein, enzymatic hydrolysis of the schisandra protein and graded purification of an enzymatic hydrolysate, wherein preparation of the schisandra protein comprises the following steps: weighing the schisandra protein, adding distilled water, keeping heat at 55 DEG C for 30 min, regulating pH to 8.0, adding 16000 U/g neutral protease, performing enzymatic hydrolysis at40 DEG C for 6 h, deactivating enzyme, performing cooling, performing centrifugation at 4000 r/min for 20 min, taking supernatant and freeze-drying the supernatant to obtain the enzymatic hydrolysate; performing graded purification and collecting components with molecular weight between 10000 u and 5000 u, molecular weight between 5000 u and 3000 u and molecular weight being 1000 u or lower. Theprovided enzymatically hydrolyzed peptides B, C and E added to feed have the advantages that feed cost of the layers can be reduced greatly, and layer breeding yield is increased.