The invention discloses a prunella vulgaris preparation having effects of clearing liver and improving eyesight and a preparation method thereof. The prunella vulgaris preparation is prepared from 150-160 weight parts of prunella vulgaris, 1-2 weight parts of leaf of vetchleaf sophora, 2-3 weight parts of cassia seed, 2-3 weight parts of wolfberry, 1-2 weight parts of semen cuscutae, 2-3 weight parts of white hyacinth bean, 1-2 weight parts of celosia seeds, 1-2 weight parts of pipewort, 1-2 weight parts of hazelnut kernel and 25-30 weight parts of haw. Prunella vulgaris is processed with a plurality of the traditional Chinese medicines having effects of clearing liver and improving eyesight so that effects of clearing liver and improving eyesight are outstanding and obviously improved. Through mixing and scenting of prunella vulgaris and haw, the prunella vulgaris preparation has a chrysanthemum fragrance. Through drinking for a long time, the prunella vulgaris preparation can improve and protect eyesight.