Cirrospilus eniophyesi Yang is an important parasitoid wasp of Aceria pallida Keifer. The larvae feed on nymph and adult mite in a gall. Totally 16～21 days was needed for the wasp to complete its life circle at the temperature of 25±1℃. Adult longevity was influenced by the food fed after emergence and its sex. A female fed with 10% honey solution could live 6.94±0.67 days on average and male 5.14±0.49 days, but a female could only live 1.96±0.27 days and male 1.06±0.29 days if they fed nothing. Food the wasp fed after emergence also influenced their fecundity. The fecundity of the wasp fed with 10% honey was 29.13±6.12 eggs on average and the wasp fed on clear water could lay 23.14±3.16 eggs on average. The oviposition peak was in the second day after adult emergence. Adults emerged at 6:00～8:00 am or 4:00～6:00 pm. The wasp copulate soon after the emergence. The population dynamics of C.eniophyesi was related to the population  of its host, the maximum parasitical rate was 83.3 % on late June and early July.