The invention discloses a formula of natural compound essential oil for improving a reproductive system, and relates to the field of health care. In order to solve the problem of improving the reproductive system, the preparation method specifically comprises the following steps: preparing distillation equipment, performing distillation by respectively adding borneol, Zhuifeng, myrrh, thyme, borneol, cistanche deserticola, herba epimedii and cynomorium songaricum through a distillation method, and respectively preparing crude essential oil; respectively carrying out carbon dioxide supercritical extraction on the crude essential oil to obtain secondary essential oil; and respectively fractionating the secondary essential oil, adding lavender oil, lemon oil, rosemary oil and tea tree oil, and performing mixing under stirring to obtain the natural compound essential oil. The natural compound essential oil can dredge prostate bodies to remove stasis and dampness, resolve inflammation, swelling and discomfort of the reproductive system and relax pelvic muscle groups; the natural compound essential oil can promote blood circulation to remove blood stasis and dampness, tonify kidney and qi and stabilize reproductive system health after long-term use; the perineum area of a human body is easily damp and stuffy to generate bacteria to cause peculiar smell, rash and the like, so that thenatural compound essential oil can enhance skin resistance after long-term use.