Abstract: This study aimed to investigate the effects of emamectin benzoate on the growth, development and consumption rate of Ectropis grisescens, in order to provide data support for its application in the controlling of Ectropis grisescens. By constructing the age-stage two-sex life table, the effects of feeding on the second leaf under tea shoot buds treated with 0.0091 mg·L⁻¹ emamectin benzoate on the developmental duration, survival rate, fecundity, adult longevity and consumption rate of E. grisescens were analyzed with the water treatment as the control group. The results showed that: compared with the water control group, the survival rate (70.00%), total consumption rate (3211.58 mm²), intrinsic rate of increase (r = 0.1241 d⁻¹), net reproductive rate (R₀ = 71.14 offspring/individual) and fecundity (187.21 offspring/individual) of E. grisescens larvae in the treatment group of emamectin benzoate were significantly decreased (the values in the water control group were 98.00%, 4529.36 mm², 0.1325 d⁻¹, and 82.18 offspring/individual, and 205.45 offspring/individual, respectively). The larval stage (30.40 d), mean generation time (T=34.36 d) and total pre-oviposition period (TPOP = 32.37 d) were significantly prolonged (the values in the water control group were 29.14 d, 33.28 d and 31.55 d, respectively). The study showed that the treatment of 0.0091 mg/L emamectin benzoate significantly inhibited the consumption rate, developmental duration, and intrinsic rate of increase of E. grisescens, which demonstrated a certain control effect.