Boron-zinc-magnesium-rich full-water-soluble banana special purpose fruit-swelling fertilizer and preparation method thereof

The invention discloses boron-zinc-magnesium-rich full-water-soluble banana special purpose fruit-swelling fertilizer and a preparation method thereof and belongs to the technical field of agricultural fertilizer. In order to solve the problem that improper selection of the banana fertilizer causes nutrient imbalance and seriously influences banana quality and yield. The boron-zinc-magnesium-rich full-water-soluble banana special purpose fruit-swelling fertilizer comprises 250 to 450 parts of urea, 40 to 150 parts of monoammonium phosphate, 450 to 650 parts of potassium sulfate, 2 to 10 parts of a boron element, 0.5 to 5 parts of a zinc element, 0.5 to 5 parts of a magnesium component and 0.2 to 1 part of a fruit-swelling aid. The fertilizer is prepared according to the actual demand of the nutrients in the growth period of the banana. The components are mutually promoted and none is dispensable. The components produce synergism and satisfy nutrient demands in a banana growth period so that the quality and yi