The invention relates to a vacuum refining method of health-care
plant essential oil. According to the method, a
distillation refining equipment is adopted, and the
distillation refining equipment comprises a
distillation tank, a top cover, a material placing device and an auxiliary device, the specific method for preparing the
plant essential oil by adopting the distillation refining equipment comprises the following steps: cleaning raw materials, crushing the raw materials, heating, distilling, extracting, condensing and collecting, wherein a material placing device comprises an outer ring body, an inner ring body, a material bearing ring, a crushing
rotating disc, a fixed ring seat, a driving gear ring, a driven gear, a stirring frame and a connecting frame. After
plant raw materials are crushed through the material placing device,
essential oil is extracted from the raw materials in a distillation mode under the cooperation effect of the auxiliary device, and meanwhile the materialplacing device can stir the raw materials in multiple directions, so that the situation that the raw materials at part of positions cannot make full contact with steam is avoided; the material placing device is detachably connected with the distillation tank, so that a worker can conveniently and periodically clean residual materials in the material placing device.