In order to provide the basis for determination of appropriate feeding standard, this experiment compared the effects of different feeding standards on weight gain, organ development, slaughter performance and meat quality of Dorper×thin-tailed Han crossbred meat lambs. Six hundreds Dorper×thin-tailed Han crossbred male lambs[(28.30±0.86) kg of body weight] were randomly assigned into 4 groups with 3 replicates in each group and 50 lambs per replicate in a single factor experimental design. The experimental diets were formulated according to the following four feeding standards:feeding standard established by our laboratory (key laboratory of feed biotechnology of the ministry of agriculture, feed research institute, Chinese academy of agricultural sciences) based on the study of nutrient requirements of Dorper×thin-tailed Han crossbred sheep (abbreviated to‘CARS’), NRC (2007, USA), AFRC (1993, UK) and Feeding Standard OF Meat-Producing Sheep and Goats of Chinese agricultural industry standards (HB, NY/T 816-2004). The experiment lasted for 81 d, feed intake was recorded every 3 days and lambs were weighed every 20 days. Ten lambs in each group were slaughtered to determine slaughter performance, tissue and organ weight and meat quality after the lambs in CARS group reached 44 kg of average body weight. The results showed as follows:actual dry matter intake showed NRC group > AFRC group > CARS group > HB group, and significant differences were observed between NRC group and CARS or HB groups (P<0.05), but there was no significant difference among the other groups (P>0.05). For average average daily gain and carcass weight, no significant differences were observed among CARS, HB and AFRC groups (P>0.05), but these groups were significantly higher than NRC group (P<0.05). There were significant differences of feed conversion ratio among groups (P<0.05), and CARS group < HB group < AFRC group < NRC group. For dressing percentage, CARS group was significantly higher than NRC group (P<0.05), but no significant differences were found among CARS, AFRC and HB groups (P>0.05). The percentages of heart, kidneys and liver weight of live weight before slaughter in CARS group were significantly higher than those in the other three groups (P<0.05). Water losing rate and meat color's L^*, a^* and b^* values of the longissimus were not significantly different among all groups (P>0.05). In conclusion, the actual average daily gain of Dorper×thin-tailed Han sheep crossbred meat lambs is 200 to 250 g; From weight gain and slaughter performance aspects, the standard of CARS has advantages over foreign feeding standards.