The invention relates to the field of traditional Chinese medicine, in particular to a traditional Chinese medicine composition mainly used for strengthening yang and tonifying kidney and a preparation method thereof. The traditional Chinese medicine composition is mainly prepared from an oyster extracting solution, a sea cucumber extracting solution, a dendrobium officinale extracting solution, xylitol and microcrystalline cellulose. The traditional Chinese medicine composition can be used for being made into various dosage forms, such as oral liquid, tablets, capsules, pills, granules, powder, medicinal liquor and paste. The traditional Chinese medicine composition and the preparation method thereof have the advantages that a remarkable effect is achieved on the aspect of improvement of the sexual function, experimental results show that sexual vitality of mice taking the composition is improved remarkably, the content of serum testosterone of normal mice and emasculated mice taking the composition is increased obviously, and it is thus clear that the traditional Chinese medicine composition can remarkably improve sexuality. The traditional Chinese medicine composition is a pure natural traditional Chinese medicine preparation, the untoward effect and side effect caused by irritation of the stomach and intestines can be reduced, the effectiveness is achieved fast, and the composition can be made into various dosage forms for a user to take.