The invention discloses tea paste for treating insomnia and a preparation method thereof. The tea paste is mainly prepared by repeatedly decocting, filtering, distilling and drying constituting raw materials, including green tea, fresh rose, Chinese magnoliavine fruit, dried ginger, astragalus, silktree albizzia bark, pinellia tuber, plantain seed, cassia twig, dangshen, coptis root, white paeony root, oriental waterplantain rhizome, indian buead, shelled cedar seed, tuber fleeceflower stem, liquoric root, Chinese angelica and hen egg yolk according to certain parts by weight. The preparation method is easy; the prepared tea paste for treating insomnia is refined by performing drying, sieving and the like on a plurality of first-class raw materials, tastes fresh, cool and delicious, smells fragrant, has the effects of enhancing the human body immunity and treating insomnia; and moreover, a plurality of Chinese medicinal herbs are added into the tea paste, so that the tea paste has high nutrient content.