Abstract: A new technology for the preparation of feed grade zinc oxide from chlorine-containing flue dust was studied.The process uses chlorine-containing flue dust as raw material，which was synthesized into intermediate product——basic zinc carbonate after acid-leaching and purifying.Then feed grade zinc oxide was prepared from basic zinc carbonate through filtrating，washing，drying and calcination.The effects of acid-leaching and impurity-removing conditions as well as the calcining temperature and time on product quality were primarily investigated.Results showed that： the zinc leaching rate can reach 95% while adopting 30% (mass fraction) sulfuric acid；the impurities can be completely removed by 27.5% hydrogen peroxide solution oxidizing Fe and two-stage zinc powder displacement method；feed grade zinc oxide with mass fraction of 98% can be prepared by controlling calcining temperature at 800 ℃ for 4 h.This method uses cheap flue dust as raw material.Therefore，it has the advantages of extensive raw material resource and low cost. In addition，the prepared products can meet the standard of HG/T 2792—1996 (first grade).