Abstract: The carbon budget of Penaeus chinensis feeding on polychaet worm(Neanthes japonica) was determined at various levels of temperature (20℃,25℃,30℃) and body weights(0.271±0.041g,3.509±0.301g,11.062±1.027g) from May to September,1996.The results show that the carbon consumption was significantly affected by water temperature and body weight,which significantly increased with increasing temperature and decreasing body weight.The average carbon consumptions at 20℃,25℃ and 30℃ were 12.41,19.12 and 26.08mg·g^-1·d^-1,and those for 3 body weights were 36.06,12.17 and 9.38mg·g^-1·d^-1,respectively.The intake carbon allocation was not significantly affected by body weight,but significantly affected by water temperature.The proportions of carbon allocated to growth,fecal,exuviation and metabolism at three different temperatures were 31.23%,4.28%,7.94%,56.45%;26.83%, 2.92%, 6.69%,65.79%;16.86%,2.38%,5.99%,74.76%, respectively.