To determine the effect of different doses of compound enzyme A on the growth performanceand survival rate of Cherry Valley ducks，a total of 765 1-day-old cherry valley ducks were selected anddivided into five group． The enzyme A 0，100，200，300 and 400 g/t were respectively added to the feedgroup and body quality，feed intake，feed conversion ratio，and survival rate were measured． The experi-mental results showed that adding compound enzyme could increase ducks' feed intake and feed conver-sion rate and promoted the growth of ducks at the concentration of 300 g/t． By contraries when the addedconcentration was 400 g/t，the promotion effect was rather decreased． The effect of enzyme concentrationon feed intake was not obvious． The results showed that the addition of compound enzyme A in duck feedcould effectively improve the growth performance and feed conversion rate of duck，and the optimaladding concentration was 300 g/t．