The compound fertilizer production line is a production process featuring non-drying and normal-temperature technology, covering such links as raw material batching, mixing, granulation, drying, cooling, grading, coating and packaging. This production line boasts low investment, quick results, compact layout, scientific rationality and advanced technology. It also enables energy conservation and consumption reduction, with stable operation and convenient maintenance. Suitable for granulating various raw materials, it can produce compound fertilizers of various concentrations and types, including organic fertilizers, inorganic fertilizers, biological fertilizers and magnetic fertilizers, etc.