The invention relates to a traditional Chinese medicine composition used for tonifying yang and a preparation method thereof. The traditional Chinese medicine composition is prepared from thirty five traditional Chinese medicines, namely cynomorium songaricum, rhizoma curculiginis, morinda officinalis, Chinese angelica, fructus cnidii, cistanche, tuber onion seed, schisandra chinensis, red ginseng, penis and testis of ox, kidney of dog, cornua cervi pantotrichum, black prepared lateral root of aconite, cinnamon, fennel, actinolite, wild pepper, semen cuscutae, the bark of eucommia, flatstem milkvetch seed, codonopsis pilosula, dogwood, herba epimedii, milkvetch, Chinese yam, prepared rehmannia root, fructus psoraleae, barbary wolfberry fruit, raspberry, polygala tenuifolia, lotus stamen, cherokee rose fruit, rhizoma alismatis, liquorice and poria cocos. The traditional Chinese medicine composition used for tonifying yang has the effects of invigorating the kidney, strengthening yang, replenishing essence and solidifying genuine qi and is mainly used for treating impotence, spermatorrhea and premature ejaculation caused by deficiency of kidney yang or kidney yin. A preparation process is advanced, the contents of active ingredients are high, clinical pharmacodynamic test effect is obvious, bioavailability is high, and no toxic or side effect is produced.