Water soluble fertilizer containing humic acid is a kind of fertilizer made of humic acid as the main source of organic matter through chemical reaction and processing. It is rich in organic matter, nitrogen, phosphorus, potassium and other nutrients, and easy to be absorbed and utilized by crops. Compared with traditional chemical fertilizers, humic acid-containing water-soluble fertilizers have the advantages of being gentle, harmless and non-polluting to the soil, which can effectively improve the quality and resilience of crops.