Fuente: WIPO "industrial hemp" The invention relates to a preparation method of industrial hemp oil, which comprises the following steps: drying industrial hemp at high temperature, extracting with supercritical carbon dioxide to obtain an extract, winterizing the extract for dewaxing, carrying out molecular distillation to remove impurities, and finally obtaining a zero-THC industrial hemp extract through preparative chromatography. According to the method for preparing the industrial hemp extract, chlorophyll does not need to be removed through a color removal step, the industrial hemp extract containing no drug active ingredient THC is obtained, and industrial hemp oil rich in CBDV and industrial hemp oil rich in CBD can be obtained through secondary preparation of the zero-THC industrial cannabinoid oil.