Abstract: Dastarcus helophoroides (Fairmaire) (Coleoptera: Bothrideridae) is an important parasitoid of many cerambycid wood borers in China, including Massicus raddei (Blessig), Batocera lineolata Chevrolat, Monochamus alternatus Hope, Anoplophora glabripennis Motschulsky, Apriona swainsoni Hope etc. In mass rearing it as a biocontrol agent to control those pests, the relationships between its development, reproduction and temperature, including development-starting temperature and effective accumulated temperature of its egg, larva and pupa stages were studied in this paper. Also the time for 50% mortality of adults under lack of nutrition condition with the treatment of five different temperatures, and fecundity with sufficient nutrition supply were examined. Results showed that the relationship of its egg development with temperature accorded with model of power number, and the egg development-starting temperature and effective accumulated temperature were 12.80 ℃ and 126.09 day-degree, respectively. The relationship of larval and pupal development with temperature accorded with parabolic curve, and larval and pupal development-starting temperature and effective accumulated temperature were 11.7 ℃, 139.0 day-degree and 13.9℃, 265.24 day-degree, respectively. The time for 50% mortality of adults under lack of nutrition condition was 62?63 d at 16?19 ℃, indicating that the parasitoid beetle had a high tolerance for starvation. Fecundity of D. helophoroides reached to the maximum with sufficient nutrition supply at temperature 22?25 ℃. Under sufficient supply of artificial diet, the life-span of D. helophoroides adults could last over 4 years at 22?25 ℃, and the optimal temperature for mass rearing of the parasitoid was 22 ℃.