Stag beetles are a well-established group of ornamental insects.To provide a theoretical foundation for the artificial rearing and population expansion of Prosopocoilus biplagiatus,we examined the biological characteristics of P.biplagiatus and its growth and development at different stages(egg,larva,pupa,and adult)in response to different temperatures based on indoor rearing and observation.The results showed no significant differences between males and females in terms of larval stadium and head capsule width at a temperature of 23 ℃.The head capsule width and body weight of larvaes were significantly different at different stages.The durations of the egg,larval,and pupal stages for females were 18.77,146.47,and 22.07 days,respectively,whereas the corresponding values for males were 17.48,148.64,and 21.02 days,respectively.We identified that the optimum temperature range for the survival of P.biplagiatus was 19~27 ℃.In response to an increase in temperature,there was a tendency for the larval and pupal duration of males and females to shorten,with a temperature of 19 ℃ being identified as the most suitable for growth and development.The length and weight between male and female adults were significantly different at different temperatures(P<0.05).Furthermore,the temperature appeared to influence the length and shape of the mandibles of male P.biplagiatus.