The present invention provides a fertilization method of water radish, during each growth period of water radish (including from germination to leaf expansion stage, from new shoot growth stage to before flowering, flowering stage, from young fruit stage to before hard core stage) , from the beginning of the hard core period to before the color change period, from the beginning of the color change period to the harvest period, after picking the fruit), choose Bili water-soluble fertilizer, strong force water-soluble fertilizer, flower power water-soluble fertilizer, boron power water-soluble fertilizer, fruit power water-soluble fertilizer Fertilizer, high-potassium fertilization, root calcium water-soluble fertilizer, gaili water-soluble fertilizer, root-stimulating sweetening liquid, leaf-preserving magnesium water-soluble fertilizer and other fertilizers, combined with spraying foliage and flushing roots, water radish Supplement calcium, magnesium, iron, zinc, manganese, boron, copper, molybdenum and other nutrients required for each growth period, combined with traditional root application of organic fertilizer, nitrogen fertilizer, phosphorus fertilizer, potassium fertilizer, and compound fertilizer, can make water radish grow in its various It can quickly and fully obtain the required nutrients in a timely manner, maintain nutritional balance, ensure the normal growth of water radish, and improve the yield and quality of water radish fruit.