Body temperature of non-breeding Chinese Alligators(Alligator sinensis)in captivity and the environmental temperature(water temperature and atmosphere)were measured for a whole year.The yearly body temperature of alligators with body length 116.83±32.26 cm(n=183)was 18.81±8.08℃,male was 20.81±9.69℃(n=42)and female was 17.81±8.56℃(n=69),respectiveley.The body temperature of alligator in the active period from April to November was 25.54±5.24℃(n=89),while the water temperature was 25.42±5.20℃(n=89).No significant difference was found between body temperature and water temperature(P>0.05).In hibernating period(December to March of next year),the body temperature of Alligators was 10.78±1.90℃(n=94)and the ground surface temperature at the hibernation point was 10.64±1.74℃(n=94).No significant difference was recorded between their body temperature and ground surface temperature(P>0.05).The results indicated that the body temperature of Chinese Alligators was significantly influenced by the environmental temperature,but not by its body length and gender;water environment was the most important control factor for the fluctuation of the body temperature.The prime body temperature ranged of Chinese alligators was 28-33℃。