The present invention is to extract a salt component from plants. The present invention comprises putting Salicornia herbacea stems or leaves, stems and fruits of Rhus chinensis into silver-ionic water, stirring the same for 30 minutes to one hour, extracting sap by a screw manner or a squeezing manner at the room temperature and making a powder after drying the sap.COPYRIGHT KIPO 2015식물에서 소금 성분을 추출한 것이다.