The invention relates to a preparation method of turnip, red date, cordyceps sinensis and fish healthcare soup. The preparation method comprises the following steps: cleaning fish, cutting fish into fish blocks, mincing the fish blocks into paste, adding rice juice and red date juice to partial fish blocks, sufficiently mixing, grinding into pulp by virtue of a colloid mill, boiling for 10 to 15 min, then cooling, adding cordyceps taishanensis seed liquid, and oscillating and fermenting in a light shielding manner; washing turnips, cutting the turnips into strips, sterilizing, adding salt, mixing with lactobacillus for fermenting, and obtaining fermented pickled turnip; immersing the rest fish blocks in a fish meat cordyceps sinensis fermented solution, then mixing with the fermented pickled turnip, pressurizing and fumigating, taking out the fish blocks and the fermented pickled turnip, adding water and red dates, decocting the rest fish meat cordyceps sinensis fermented solution, and obtaining the fish soup; and packing, cold storing or freezing. By adopting the fish meat paste as the base material and fermenting with cordyceps sinensis liquid and then by virtue of the fumigation and decoction of the fermented pickled turnip, the fish soup is delicious and thick in taste, removes the fishy odor of the cordyceps taishanensis, and is rich in active ingredients such as cordyceps sinensis polysaccharide, cordycepin, cordycepic acid, adenosine and the like and suitable for old people, pregnant women, delivery women, the weak and patients to eat.