Abstract:The object waste water of this study come from the extraction process of LCD for recoving Indium. We developed a lime neutralization oxide process and researched its effective and cost. After lime neutralization, the concentration of Pb, Cr and Cd ions were far below the “industrial water reuse standards (GB / T 19923-2005)”, and the Al, Fe, Pb, Zn removal rate reached 99.8%, 99.9 %, 96.82%, and 99.61%, respectively. The content of each component in the neutralizated bottom slag were lower than the standard limit of toxicity identification, classified as undangerous solid waste. After the oxidation treatment, the COD levels dropped from 650mg/L to 215mg/L, can be returned to the production process. Lime neutralization oxidation process has the advantage of good output water quality and achieved zero emissions. The cost of the process is only 52 yuan/m3. This study could be a technical support for wastewater reuse and zero release in the process of recovered Indium from LCD screen.