The invention relates to a preparation used for improving sleep and enhancing immunity, which adopts a wild jujuba seed extract, ganoderma lucidum wall-breaking sporule powder and a ganoderma lucidum extract as raw materials. The preparation is characterized by being prepared from the following raw materials proportioned by weight: 175-205g of wild jujuba seed extract, 135-165g of ganoderma lucidum wall-breaking sporule powder and 45-75g of ganoderma lucidum extract. After the processes of extraction and the like, fine powder is obtained by superfine pulverization and mixing, and capsules, granules, tablets and the like are prepared according to different production processes by combining medicinal auxiliary materials. The invention has the following advantages: by exerting the synergistic action of the wild jujuba seed extract, the ganoderma lucidum wall-breaking sporule powder and the ganoderma lucidum extract together, the excitement of the central nervous system is suppressed, the heart is calmed, the nerves are soothed, and the sleep quality is effectively improved. Furthermore, the invention also has the function of enhancing the immunity. The invention is suitable for the symptoms of immunity degradation, dizziness, headache, tension, angst, depression, hypomnesia, tinnitus and the like caused by insomnia.