The invention discloses an extraction method and an extraction device for cannabidiol-enriched industrial hemp essential oil. By adopting devices such as a screening machine, an oven, a soaking tank, a rotary evaporator, an ultrasonic agitation tank, a butterfly centrifuge, a first climbing-film evaporator, a proportioning tank, a pressurized chromatography silica gel column, an eluate tank, a second climbing-film evaporator, a rotary evaporator, a finished product tank and a solvent recovery tank which are sequentially connected by virtue of pipelines, industrial hemps are stepwise subjected to the operation steps comprising screening, baking, extracting, re-treating, filtering, monitoring, sampling, chromatography and concentrating to obtain the finished product and the effective component cannabidiol-enriched industrial hemp essential oil is finally extracted. By virtue of the extraction device disclosed by the invention, the defects of low efficiency, large consumption and inconvenience in scale production of the conventional process are overcome, the semi-finished product containing tetrahydrocannabinol in the processing does not artificially contact and flow, is legal, safe and efficient, the process method is simple and can be easily promoted and the product has high purity, complete active ingredients and low cost.