In this study, we carried out a research on material separation for soft PVC and HDPE mixing plastics by triboelectrostatic separation. From the research on charging characteristic for choice of charging materials, it was found that PP was optimum charging material to make high charging amount with opposite polarity for soft PVC and HDPE mixing plastics. Therefore, we manufactured a charger of pipe line type using PP material for separation of Soft PVC and HDPE. At optimum test conditions that used PP cyclone charger developed in this study, we developed a triboelectrostatic separation technique that can separate soft PVC to rejection of 98.7% and HDPE to recovery of 85.2%.