Abstract: This study aimed to investigate the effects of emamectin benzoate on the growth, development, and consumption rate of Ectropis grisescens, providing data support for its application in pest controlling. By constructed age-stage, two-sex life table, this study compared the developmental stage, survival rates, fecundity, adult longevity, and consumption rate of E. grisescens under 0.0091 mg·L⁻¹ emamectin benzoate treatment（via leaf dipping method）and water control. The results showed that compared to the water control, treatment with 0.0091 mg·L⁻¹ emamectin benzoate significantly decreased the survival rate（70.00%）, preadult total consumption rate（3211.58 mm²）, intrinsic rate of increase（r = 0.1325 d⁻¹）, net reproductive rate（R₀ = 82.18 offspring/individual）, and fecundity（205.45 offspring/individual）of E. grisescens（water control values were 98.00%, 4529.36 mm², 0.1241 d⁻¹, and 71.14 offspring/individual, 187.21 offspring/individual）. And the immature duration（30.40 d）, total pre-oviposition period（TPOP=34.36 d）, and mean generation time（T=32.37 d）had significantly longer（water control values were 29.14 d, 31.55 d, 33.28 d）. The results showed that 0.0091 mg·L⁻¹ emamectin benzoate significantly inhibited the consumption rate, developmental stage, and intrinsic rate of increase of E. grisescens, which demonstrating a good control effect.