The invention provides a preparation method and application of lubricating liquid, and relates to the field of preparation of pleasant
sensation liquid. The preparation method of the lubricating liquid comprises the following steps: S1, respectively
grinding the Chinese prickly ash, the liquorice root, the kudzuvine root and the
white willow bark into
powder, and then soaking the
powder in a 50% (W / W) water-
alcohol mixed solution according to the ratio of 1: 3; s2, stirring during soaking; s3, filtering by using a filter screen after soaking is finished, so as to obtain a clear solution extract; s4, preparing water and
ethanol, and stirring and mixing the water and the
ethanol; s5, adding a Chinese prickly ash extract, a licorice extract, a radix puerariae extract and a
white willow bark extract, and mixing and stirring; and S6, obtaining the sprayable lubricating liquid. According to the invention, the self-made
plant extract is prepared into the lubricating liquid according to a specific proportion, so that the lubricating liquid is sprayed or smeared on the private parts of women or males during use, the crunchy feeling of the private parts can be quickly caused, and the harmony of the two sexes can be effectively promoted.