Fertilizer adhesive and preparation method thereof

The invention discloses fertilizer adhesive. The fertilizer adhesive is characterized by being prepared through the following raw materials in parts by weight: 10-20 parts of modified slag powder, 20-40 parts of attapulgite, 20-40 parts of calcium chloride, 15-25 parts of hydroxypropyl methyl cellulose, and 5-7 parts of an adhesion promoter. The invention also discloses a preparation method of thefertilizer adhesive. The fertilizer adhesive is of a powder form which is convenient to store and transport; the raw materials are low in price and easy to obtain; the prepared adhesive is high in adhering capacity, and the pressure resisting intensity and the granulating rate of the fertilizer can be obviously improved; the modified slag powder is used, thus massive waste slags are utilized, therecycling of the waste slag is achieved, and the production cost is decreased, and moreover, the modified slag powder act together with the adhering promoter to obviously improve the adhering capacity of the fertilizer adhesi