The invention discloses a complex enzyme preparation improving broiler chicken breeding performance. The complex enzyme preparation is characterized by being prepared from a carrier, xylanase, cellulase, alpha-galactosidase, beta-mannase, pectinase, amylase, lipase and protease, wherein xylanase, cellulase, alpha-galactosidase, beta-mannase, pectinase, amylase, lipase and protease are added in the carrier. In each gram of the complex enzyme preparation improving broiler chicken breeding performance, the activity of xylanase is 1000-10000 U, the activity of alpha-galactosidase is 2-40 U, the activity of cellulase is 100-3000 U, the activity of beta-mannase is 100-2500 U, the activity of pectinase is 100-3000 U, the activity of amylase is 100-3000 U, the activity of lipase is 50-2000 U, and the activity of protease is 1000-10000 U. According to application of the complex enzyme preparation improving broiler chicken breeding performance in broiler chicken feed, 100-1000 g of the complex enzyme preparation is added in each ton of complete feed. The complex enzyme preparation can generate the emergy of 25-85 kcal/kg, effectively degrade antinutritional factors such as soluble xylan, mannan and alpha-galactoside, increase the digestion rate of nutrients such as protein and amino acid, improve broiler chicken productivity and lower breeding cost.