Abstract: Tea waste is a abundant and low-cost biomass resource for preparation of Activated Carbons (ACs) The present study addressed a pyrolysis route using KOH as an activating agent to develop with new pores of the ACs from tea industry waste. The effects of activation temperatures (600-800°C) on the structure of ACs were investigated. Characteristics of ACs were analyzed by several physical techniques such as analysis methods including X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), Thermo-Gravimetric Analysis (TGA) and nitrogen adsorption/desorption. The characterization results indicated that the as-synthesized ACs possess amorphous structure for all activation temperatures and the largest BET specific surface area (1107.5 m2/g) accompanied with the highest pore volume (0.579 cm3/g) at 800°C. The average micropore size fluctuated in the range of 5-7 A depending on the activation temperature. Therefore, the KOH-activated carbons with high porosity can offer a great adsorption capacity as promising for applications in many areas especially in removal of environmental pollutants.