The invention discloses sub-health nursing traditional Chinese medicine composition and a preparing method thereof. The traditional Chinese medicine composition is prepared from the following raw medicine: raw radix astragalis, radix pseudostellariae, crude radix dioscoreae oppositae, roasted rhizoma atractylodis macrocephalae, honey-fried licorice root, radix angelicae sinensis, prepared rehmannia root, parched white peony root, stir-baked semen ziziphi spinosae, platycladi semen, semen nelumbinis, lilii bulbus, tuckahoe with pine, steamed fructus schisandrae with vinegar, fructus amomi, raw fructus crataegi, roasted medicated leaven, endothelium corneum gigeriae galli, roasted malt, roasted mangnolia officinalis, corni fructus, roasted eucommia cortex, cibotii rhizoma, black sesame, juglandis semen, roasted black soya bean, costus root, processed cyperus, citri reticulatae pericarpium, salviae miltiorrhizae radix, chuanxiong rhizoma, radix curcumae, poria cocos, semen coicis and radix ophiopogonis. The preparing method comprises the following steps of smashing crush drug into fine powder, screening the fine powder through a 180-mesh bamboo basket, collecting medical powder and radiating and sterilizing the medical powder through cobalt-60 gamma rays after the medicial powder is evenly mixed.