This experiment was conducted to study the effects of dietary methionine (Met) levels on growth performance, carcass quality, feather and carcass protein retention and meat quality, and to determine the Met requirements in yellow-feathered broiler chickens aged from 43 to 63 days based on quadratic regression model. One thousand and six hundred 43-day-old Lingnan yellow-feathered broiler chickens were divided into 10 groups (5 groups each gender) with 4 replicates per group and 40 chickens in each replicate according to body weight and gender. Five dietary treatments were compared in a 5×2 factorial arrangement with five dietary Met levels (0.25%， 0.30%， 0.35%， 0.40% and 0.45%) and two genders. The results showed that with the increasing of Met supplementation levels, daily total Met and true digestible Met intake of female and male birds were increased linearly or quadratically (P<0.05), feed/gain of male chickens was decreased quadratically (P<0.05), and eviscerated percentage and breast muscle percentage of both male and female chickens were increased quadratically (P<0.05 or 0.10). Compared with the diets with 0.25% and 0.35% Met, diets supplemented with 0.40% and 0.45% Met decreased the dressing percentage of male chickens (P<0.05). Compared with the diet with 0.25% Met, diets supplemented with 0.30% and 0.45% Met decreased the abdominal fat weight and percentage of male chickens (P<0.05), and diets supplemented with 0.35%, 0.40% or 0.45% Met significantly increased the DM content and protein retention in the feather, and feather or carcass protein content of female chickens (P<0.05). In conclusion, appropriate Met can enhance the feed conversion rate, improve the carcass quality and promote the feather growth of yellow-feathered broiler chickens. However, excessive Met has a negative effect on carcass quality. The estimated Met requirements for female yellow-feathered broiler chickens to gain maximum eviscerated percentage or breast muscle percentage are 0.269% and 0.330% (total Met), and 0.246% and 0.307% (digestible Met), respectively. The Met requirements for males yellow-feathered broiler chickens to gain maximum eviscerated percentage, breast muscle percentage and minimum feed/gain are 0.353%, 0.289% and 0.313% (total Met), and 0.330%, 0.266% and 0.290% (digestible Met), respectively.［Chinese Journal of Animal Nutrition，2011，23（2）：210-218］