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Batik is one of Indonesias cultural heritages that spread across various regions with their unique characteristics, one of the regions that has batik industries is Pemalang Regency. However, batik industries also contribute to liquid waste. Wastewater containing pollutants such as waxes, resins, dyes and binders such as silicates produce high concentrations of Biochemical Oxygen Demand (BOD) and concentrated colors. There are still many batik enterprises that dispose waste water directly to environment without being processed first. The aim of this study is to degrade Remazol Black B and Biochemical Oxygen Demand (BOD) dyes in batik liquid waste to contact time variations 0, 15, 30, 45, 60 minutes with UVC-Ozone oxidation methods. The Ozone-UVC method is an alternative method for decolorization, and degradation BOD. The dye degradation test was carried out using Spectroquant UV / VIS Spectrophotometer and the BOD degradation test was carried out using Dissolved Oxygen - DO Meter AZ-8403. The result shows that the BOD degradation at batik wastewater was from 190.17 – 96.83 mg/L. Visually, the increase in treatment time makes the sample look clearer (decolorization), evidenced by the sample image and decreased absorbance results.