The experiment was conducted to study the effects of poultry fat levels (30 or 24 g/kg) and diets with or without exogenous emulsifier lysophosphatidylcholine (LPC) supplementation on performance, fatty acid apparent digestibility, and apparent metabolizable energy (AME) content in broiler chickens. One hundred and sixty-eight Arbor Acres broiler chickens (male) with one-day-old were randomly divided into 4 treatments (7 replicates per treatment and 6 broiler chickens per replicate) accorditn to 2×2 factorial design. Growth performance, nutrient apparent digestibility and AME were determined. The results showed that levels of fat addition had no significant effects on performance, fatty acid apparent digestibility and AME in broiler chickens (P>0.05). The addition of LPC significantly increased body weight gain (P<0.05) of broiler chickens and AME (P<0.05) of the diets at the age of 14～17 d, and significantly reduced F/G (P<0.05). There was an increasing tendency of ether extract by addition of LPC at the age of 14～17 d (P=0.086). The addition of LPC significantly increased apparent digestibility of C18∶0 fatty acid at the age of 14～17 d (P<0.05), but had no significant effect on the apparent digestibility of other fatty acids and crude protein and dry matter under the conditions tested (P>0.05). These data indicated that addition of 500 mg/kg LPC in diets containing poultry fat improved broiler performance; the effect of LPC on broiler performance was due to the enhancement of fatty acid apparent digestibility.［Chinese Journal of Animal Nutrition, 2010，22（3）:662-669］