Abstract: According to the results the single factor experiments, the optimum conditions for the microwave extraction of wilsoniana fruit oil were determined using an orthogonal L₉(3⁴) test design. The results showed that the factors on extraction yield of wilsoniana fruit oil followed the order: different solvents>microwave power>solid to liquid ratio>extraction times. The optimum process conditions for the extraction of wilsoniana fruit oil were: wilsiniana fruit 40 g, petroleum ether as solvent, solid to liquid ratio 1∶3(g∶g), microwave power 800 W, extracting 5 times, 1 min per time. Under the optimum conditions, the wilsoniana fruit oil extraction yield was up to 8.11 %. The process provided a reference for the industrial production of wilsoniana fruit oil.

Key words: Swida wilsoniana, wilsoniana fruit oil, microwave-assisted extraction