The invention relates to a preparation method of health-care radish, red jujube and cordyceps militaris spare rib soup. The preparation method comprises the following steps of thoroughly cleaning spare ribs, and cutting a part of the cleaned spare ribs so as to obtain spare rib meat and bones; mincing the spare rib meat into minced meat, adding rice water and red jujube juice, performing grinding with a colloid mill to obtain pulp, boiling over the pulp, performing cooling, adding cordyceps militaris seed liquor, and performing vibrating fermentation away from light so as to obtain spare rib and cordyceps militaris fermentation liquor; thoroughly cleaning radishes, cutting the cleaned radishes into radish strips, performing sterilization, adding salt and mixed lactic acid bacteria, and performing fermentation so as to obtain fermented pickled radishes; cutting the spare ribs into spare rib strips, putting the spare rib strips into the spare rib and cordyceps militaris fermentation liquor for soaking, then mixing the spare rib and cordyceps militaris fermentation liquor in which the spare rib strips are soaked, with the fermented pickled radishes, performing pressurized fumigation and steaming, taking out the spare ribs and the fermented pickled radishes, adding the remaining spare ribs, water, the red jujubes and the spare rib and cordyceps militaris fermentation liquor, performing mixing, and performing decoction so as to obtain spare rib soup; and performing seasoning, performing packaging, and performing cold storage or freezing so as to obtain the health-care radish, red jujube and cordyceps militaris spare rib soup. According to the preparation method disclosed by the invention, the mashed spare rib meat is used as a base material, and the cordyceps militaris liquor is added for fermentation, so that the content of active components is high; then fumigation, steaming and decoction are performed through fermented pickled radishes, so that the spare rib soup is rich in palatable taste and free from fishy smell produced by cordyceps militaris; and the health-care radish, red jujube and cordyceps militaris spare rib soup is suitable for old people, pregnant women, lying-in women, weak people and patients to eat.