Abstract: In June 2018, 8 pairs of Allomyrina dichotoma adults were captured in Dendrobium officinale plantation in Hangzhou, Zhejiang province. They were captive breeding for observation and determinations. During March and August 2018, field investigations were carried out on behavior of larva and adult of A. dichotoma. The results showed that it had 1generation each year, under captive breeding, 3-instar larva had weigh of 16.0-37.0 g (male 34.517 0±1.594 9 g, female 24.076 4 g±1.157 7 g). Egg stage had 14-24 days, male larval phase of 195-265 days and female of 201-225 days, pupal period of 16-21 days, adult-emergence of 10-17 days. The morphological and biological characteristics of each insect stage were clarified, and the method of artificial breeding was systematically described. The experiment demonstrated that captive breeding instar had larval phase of 7 months while field one 8-10 months.