High-concentration water-soluble fertilizer

The invention discloses a high-concentration water-soluble fertilizer which comprises the following materials in parts by weight: 10 to 55 parts of dipotassium phosphate, 20 to 64 parts of ammonium nitrate or 50 to 72 parts of carbamide, 15 to 35 parts of soluble sylvite, 4.2 to 5.8 parts of organic matter, 1 to 3 parts of saponin, 0.2 to 5 parts of sodium tetraborate, 0.1 to 1 part of manganese sulfate, 0.1 to 1 part of copper sulfate, 0.1 to 1 part of zinc sulfate and 0.1 to 1 part of ammonium molybdate. The high-concentration water-soluble fertilizer has comprehensive and uniform nutrition, can be completely dissolved into water, cannot produce sediment and is high in dissolving speed, and the problem that an irrigation pipe is blocked by fertilization is solved; the high-concentration water-soluble fertilizer is in a full ion state, high in response speed and high in utilization rate; and the concentration of a fertilizer solution in a fertilization tank can be judged conveniently. The high-concentration