Suitable for various fertilizers and soil conditioners, it has a large feeding capacity, adjustable discharge particle size, and can crush materials with a compressive strength of ≤160N. It is especially suitable for compound fertilizer and fertilizer granulation. It features automatic iron removal, exclusion of overly hard foreign objects, and produces full and uniform discharge particles, reducing the granulation process and production costs. The crushing bottom screen is made of special manganese steel, with a low replacement frequency, requiring replacement only once every 3 years.