As one of the “three nutrients”, lipids are an important part of animal body and have rich physiological functions. Lipase hydrolyzes triglycerides into glycerol and fatty acids through step-by-step hydrolysis, which plays a regulatory role in lipid digestion, absorption and fat reconstruction. At present, the research are mainly focused on adipose triglyceride lipase, hormone-sensitive lipase and monoacylglycerol lipase. Enzyme preparation is one of the good alternatives to antibiotics in the environment of “total prohibition of antibiotics...