The invention discloses an acquisition method of aromatic plant volatile matters, which comprises the following steps: putting aromatic plants in an acquisition device containing activated carbon, and extracting gas until the aromatic plant volatile matters are adsorbed to the activated carbon, adding the activated carbon into a low-boiling-point low-toxicity organic solvent, treating in a water bath, boiling in aether, heating under reflux, cooling, standing, filtering to obtain a supernate, washing the filter residue with aether, merging the washing liquid into the supernate, and heating the supernate through water bath rotary distillation to obtain the light-yellow oily essential oil. The plant essential oil obtained by the method has the advantages of high purity, no damage on plants, no chemical change and low cost, implements in-situ extraction of the plant aromatic oil, is continuous, efficient, in-situ, natural and low in carbon, has no chemical change, acquires fresh natural aroma (aromatic plant volatile matters), and has important meanings for effectively utilizing natural resources and protecting the environment.