The present invention discloses a method for eliminating harmful substances from plant extracts. The raw materials for said plant extracts includes schisandra chinensis, rhodiola rosea L., ginseng root, ginseng steam and leaf, and etc. the method comprises the following steps: extracting the pre-treated plant raw materials intended to be extracted, adding absorbent for absorbing harmful materials to the extract solution of the plant raw materials or to the re-dissolved solution of the plant extracts, and then being heated and stirred, the solids obtained from drying the suction filtrate are the plant extracts that have eliminated harmful substances therein. The present invention can deal with the excessive polycyclic aromatic hydrocarbons and Arsenic residues, once and for all, in a steady, effective, safe and controllable, low-cost, and low-pollution manner in addition, the products of the present invention have a high recovery rate.
