Fertilizer made of seawater and preparation method of fertilizer

The invention discloses a fertilizer made of seawater. The fertilizer comprises 80-91.7wt% of mineral substance concentrated water, 2-5wt% of a moisture liquid of sulfur, 5-10wt% of a moisture liquidof Illite or sericite, 0.1-0.5wt% of kelp powder, 1-9wt% of water-soluble nitrogen, 0.1-2wt% of water-soluble boron and 0.1-2wt% of water-soluble zinc. The invention further discloses a method for preparing the fertilizer made of the seawater. A mixing ratio of the liquid fertilizer disclosed by the invention is still kept after a certain time, even if mineral substances are massively provided, obstacle caused by excessive mineral substances can be avoided, plant growth can be promoted, and a remarkable effect can be achieved even if a small amount of the fertilizer is used. By adopting the liquid fertilizer disclosed by the invention, the sugar degree of a crop can be increased, the crop quality can be improved, and economic output values can be increased. 本发明公开一种利用海水制成的肥料，包括：矿物质浓缩水80～91.7重量％、硫磺的水分产液2～5重量％、Illite