The invention relates to an extraction method of gardenia jasminoides volatile oil, and particularly relates to a method for extracting gardenia jasminoides volatile oil by adopting ultrasonic-microwave synergic technology. The extraction method comprises the following steps: putting gardenia jasminoides powder into a container, adding distilled water the weight of which is five to eight times that of the gardenia jasminoides powder, extracting by adopting ultrasonic-microwave technology, controlling the ultrasonic power to 500W, microwave power to 400-600 so as to perform continuous extraction for 2-3 hours, filtering, extracting the filtrate for two to three times with an organic solvent, combining extracting liquor, drying with anhydrous sodium sulfate, and conducting pressure-reduced concentration, to obtain gardenia jasminoides volatile oil. By fully utilizing the ultrasonic-microwave superposition effect, the extraction method has the advantages of being simple in technology, low in energy consumption, high in yield and the like, and is an environment-friendly extraction method of gardenia jasminoides volatile oil, thus being applicable to industrial production.