The invention provides duck feed containing lipase. The duck feed comprises the following components, by weight, 40-50 parts of wheat, 12-15 parts of rice bran, 10-13 parts of maize germ dregs, 5-10 parts of corn, 5-10 parts of rice bran dregs, 4-7 parts of rapeseed dregs, 3-6 parts of cottonseed meal, 3-5 parts of pre-mixed materials, 0.01-0.04 part of liquid phytase, 0.01-0.03 part of xylanase, and 0.01-0.03 part of lipase. Preferably, the lipase comprises aspergillus niger lipase. The invention further comprises a preparation method of the lipase. The duck feed can improve the digestion rate of thick fat, can improve quality of feed, is stable and lasting in function and higher in activity, achieves the purpose of reducing cost through reducing adding amount of fat.