The separation of elements with different conductivities is widely applied in industry, agriculture, e-waste processing technology. This paper presents the developed device and the research results, implementing the technology of high-voltage electrostatic technique in particles separation. Application of the technology has been studied over the world for many years due to its advantages, such as low power consumption, high separation performance and environment-friendly. However in Vietnam, the deep research of technology and impact of different factors, such as the electric field and the environment, has not been invested sufficiently.