Preparation method and application of Sanbai watermelon seed oil

The invention relates to a preparation method of Sanbai watermelon seed oil, which includes the steps of: cleaning the Sanbai watermelon seeds and soaking the seeds in a NaCl solution; taking out theseeds, and placing the seeds on a pressure bearing tray in a hydraulic machine, starting the hydraulic machine to perform hydraulic compression to the seeds to obtain crude oil; heating the crude oilto 55-65 DEG C and adding the NaCl solution according to oil-water ratio of 1:40-55, performing oil-water separation through a centrifugal oil-residue separator to obtain primary-filtered crude oil; filtering and precipitating the primary-filtered crude oil and fine-filtering a supernatant to obtain an oil finish product. The preparation method has simple process and is easy to operate, is low inproduction cost and is high in oil yield and good in oil quality. The oil has a clear appearance and is better in clarity than oil produced in a spiral squeezing method by 10%. The method can save electric energy and is short i