The invention discloses sleep-improving pseudo-ginseng flower tea and a preparation method thereof. The preparation method of the sleep-improving pseudo-ginseng flower tea comprises the following steps: 1), washing 2-5 parts by weight of pseudo-ginseng flowers, 2-5 parts by weight of pseudo-ginseng stems and leaves and 2-5 parts by weight of fructus momordicae, removing impurities, carrying out mixing, adding 700-1000 parts by weight of water and carrying out decocting for 1-2 hours, naturally cooling the decoction to 30-40 DEG C, carrying out filtering, and removing filter residues so as to obtain a filtrate; and 2), adding 10-30 parts by weight of a liquorice root extract and 300-500 parts by weight of water into the filtrate, carrying out uniform stirring and standing, filtering the obtained mixed liquid, and sterilizing the filtrate at 90-110 DEG C for 2-10 minutes, so that the sleep-improving pseudo-ginseng flower tea is prepared. The preparation method is simple in operation; and the prepared pseudo-ginseng flower tea is aromatic in odor, as well as bright and beautiful in color and luster. Moreover, the pseudo-ginseng flower tea is free of addition of any chemical preservatives and food additives.