The invention discloses a treatment method of exhaust gas generated in olive leaf extract product production. The treatment method comprises following steps: 1, spray column absorption is carried out, wherein exhaust gas is collected, and is delivered into a spray column for treatment, the spray column is a two-stage series connection spray column, and contains a filling material, a liquid phase substance in the spray column is water, the two-stage series connection spray column is used for protection, and is connected with equipment of subsequent processing; and 2, obtained treated gas is delivered into a factory chimney via a pipeline for high altitude discharge.