Due to the excessive use of pesticides and chemicals, pest resistance to insecticides is one of the most important issues that has led to the use of biological control method in the farms, which, in addition to preventing pest resistance, improves environmental issues. Habrobracon hebetor is a polyphagous and gregarious-ectoparasitoid that can parasitize the larvae of some lepidopteran pest species. So far, the effect of temperature, relative humidity, adult insect’s nutrition, host species, host size and host densities have been investigated on the biology and ecology of H. hebetor parasitoid. In this research, the effect of various diets containing plant pollens was investigated on the biological parameters of the H. hebetor at 26±2°C, 65±5 % RH, and a photoperiod of 16:8 (L:D) h. This experiment was conducted in seven treatments with four replications. Diets used in treatments include water (control), honey, vitamin C and pollens of rapeseed, apple, peach, almond, date and honeybee. In this study, the finite rate of population increase (λ), intrinsic birth rate (b), intrinsic death rate (d), mean generation time (T) and stable age distribution of adult insect (Cx) in different diets are calculated. According to the obtained results of analysis of variance, amounts of finite rate of increase (λ), intrinsic birth rate (b), stable age distribution (Cx) in different diets showed a significant difference. The finite rate of population increase (λ) and intrinsic birth rate (b) of H. hebetor was significantly higher when diet containing almonds pollen (1.068±0.0041, 0.084±0.002) were served as diet compared to other and stable age distribution of adult insect (Cx) in diets containing date, rapeseed, honey bee, peach, apple, almond pollens and control were 0.42±0.02, 0.42±0.02, 0.49±0.01, 0.55±0.026, 0.52±0.026, 0.42±0.01 and 0.6±0.04 percent