Cucurbitaceae melo var.saccharinus Naud.seed oil was extracted by ultrasound method in this study.Effects of extraction solvent

extraction temperature

and extraction time

ratio of material to liquid on oil yield were investigated by orthogonal design.The results showed that the optimal extrac-tion solvent is petroleum ether.The significance sequence of other three factors affecting oil yield is as follows:extraction temperature > ratio of material to liquid > extraction temperature

and their optimumlevels are 60°C

1:6(m/V)

20min respectively.Under these conditions

the oil yield reaches 36.97 %.GC/MS analysis was used to determine the fatty acid composition of the Cucurbitaceae melo var.saccharinus Naud.seed oil.It was found that the main fatty acids in the oil are palmitic acid

linoleic acid

oleic acid

stearic acid

octadecenic acid

methyl ricinoleate

11-eicosenoic acid

eicosanoic acid

docosanoic acid and tetracosanoic acid.The relative content of linoleic acid is the highest.