In this paper , the chlorinated paraffin was added to epoxy resin fabric with different weight percentage ratios (1%,3%,5%,7%,10%, 15% ) . All samples were molded in traditional mold ,and they were milled as a powder in the same ratios, and then added to suitable culture food media for two types of bacteria Escherichia Coli and Staphylococcus aurous. An antibiotic of chlorinated paraffin in epoxy fabric was determined as a function of it\'s concentrations. We found that the number of colonies of Escherichia Coli decrease with increasing percentage ratio of chlorinated paraffin. Also, the number of colonies of Staphylococcus aurous decrease with increasing percentage ratio of chlorinated paraffin .