Wastewater textile industry has the potential to pollute the environment. Most of the material in textile wastewater is dyes, especially synthetic dye. Synthetic dye is a complex pollutant and high color intensity. The existence of textile waste waters can interfere with the penetration of sunlight so that the life of the organism in waters will be disrupted. One of the textile wastewater treatment techniques is electro floatation. Electro floatation is the process of separation of pollutants in liquids by floating of substances or particles dispersed in the water to the surface through the formation of bubbles of oxygen gas and hydrogen on the electrode. Electro floatation process is determined by several factors, including voltage and contact time. In this study, the textile wastewater is treated by electro floatation on the voltage variations 6 and 12 V, and the contact time variations 30, 40, 50, 60 minutes. COD and color of textile wastewater was measured first. Then COD and colour of textile wastewater was measured again to determine how much effect of electro floatation in the removing pollutants. The best results of electroflotation process with COD of 122.4 mg/L (as %removal of pollutant is 88.9%) and color grade of 100 mg/L Pt-Co (as %removal of pollutant is 93.3%) obtained when a voltage was 12 V and a contact time was 60 minutes. This shows that greater voltage and longer time of electro floatation, will decreased COD and color.