The invention discloses a method for extracting essential oil from eucommia ulmoides, and belongs to the extraction of plant essential oil in the field of chemical industry. The method comprises the following steps: green leaves, tender branches, seeds and barks of the eucommia ulmoides are extracted by adopting various extracting processes and processing methods so as to obtain effective components, and then, the effective components are mixed and processed so as to obtain final products. According to the method, the effective components are extracted from the green leaves, the tender branches, the seeds and the barks of the eucommia ulmoides through different extracting processes, the effective components are mixed and processed through a special process, and finally the eucommia ulmoides essential oil is obtained. The leaves, the tender branches, the seeds and the barks of the eucommia ulmoides are furthest utilized, the extracting yield of the eucommia ulmoides essential oil is increased, and in addition, the finally obtained eucommia ulmoides essential oil has the medicinal and health functions of the leaves, the tender branches, the seeds and the barks, the application range of the eucommia ulmoides essential oil is expanded, and the economic value of the eucommia ulmoides is improved.