The invention discloses a method for preparing Xinnaokang capsules, which comprises the following steps of: crushing nine medicinal materials, namely Sichuan lovage rhizome, red flower, rhizoma alismatis, root of bidentate achyranthes, curcumae, polygala root, irkutsk anemone rhizome, spina date seed and liquorice, screening by using a 100-mesh screen and uniformly mixing; combining six medicinalmaterials of salvia miltiorrhiza, root of common peony, prepared tuber of multiflower knotweed, fruit of Chinese wolfberry, root of kudzu vine and earthworm and adding water and decocting for three times; combining the decoction, filtering, concentrating the filtrate into thick paste with the relative density of 1.35 at the temperature of 50 DEG C, adding the screened medicinal materials into thethick paste, uniformly mixing, drying, crushing and screening by using the 100-mesh screen; and adding deer heart powder, uniformly mixing and filling into capsules and obtaining the Xinnaokang capsules. The technology is simple, and the prepared Xinnaokang capsules mask the bitter taste of the medicaments, improve the medicinal stability and bioavailability, and are beautiful in appearance, convenient to take, carry and store, and accurate in dosage.