Progestin nano composition and preparation method thereof

The invention relates to a progestin nano composition, an applying pellet containing the progestin nano composition, a method for preparing the progestin nano composition and the applying pellet, preparations containing the progestin nano composition and/or the applying pellet such as capsules, tablets and lyophilized powder, and application of the progestin nano composition and the applying pellet on preparation of medicines. The medicines are used for treating and/or preventing diseases caused by hormone deficiency, or are used for hormone replacement therapy after external fertilization.