On the principle of factorial method, some parameters of the mathematical model of amino acid requirements were estimated using compared slaughter test with growing goslings and nitrogen balance test with adult geese, and amino acid requirements of 5～10 weeks Yangzhou geese were assessed by the model. The results were as follows: difference of the amino acid composition of carcass and feathers between Yangzhou geese at 5 weeks of age and at 10 weeks of age was not significant (P>0.05). The amino acid compositions of Yangzhou geese for growth from 5 to 10 weeks of age were: Lys 100, Met 44, Thr 36, Leu 90, Ile 41, Arg 59, Val 45; the amino acid compositions of adult Yangzhou geese for maintain were: Lys 100, Met 46, Thr 63, Leu 122, Ile 69, Arg 94, Val 76; the total amino acid requirements (the percentage of the diet) of Yangzhou geese from 5 to 10 weeks of age were: Lys 0.78%, Met 0.36%, Thr 0.33%, Leu 0.76%, Ile 0.37%, Arg 0.54%, Val 0.41%.［Chinese Journal of Animal Nutrition, 2010，22（1）:31-38］