Water-soluble organic fertilizer containing medium trace elements and preparation method thereof

The invention relates to water-soluble organic fertilizer containing medium trace elements and a preparation method thereof, which are applied to the field of agriculture and forestry production. The water-soluble organic fertilizer comprises organic matters, major elements and the medium trace elements. Compared with other fertilizer, the water-soluble organic fertilizer achieves two functions of soil amelioration and plant growth promotion, has the advantages of fast fertilizer efficiency, long fertilizer efficiency, comprehensive and balanced nutrition and the like, and is simple and convenient to apply; and in addition, the water-soluble organic fertilizer is completely water-soluble and adopts complete ionic states, and is convenient to be absorbed and utilized by the plants directly. The water-soluble organic fertilizer takes organic fertilizer as a raw material, wherein yeast grows to form mother liquor after cane molasses fermented, and the mother liquor is processed through spray drying so as to form