Fertilizer packaging production line capable of cooling

The fertilizer packaging production line comprises a conveying mechanism used for conveying fertilizer bags, a cooling mechanism and a discharging mechanism, the discharging mechanism comprises a dust cover, a reinforcing plate and an automatic discharging assembly, a feeding port is formed in the top of the dust cover, the reinforcing plate is arranged on one side in the dust cover, and the automatic discharging assembly is arranged on the other side of the dust cover. The automatic discharging assembly directly faces the lower portion of the feeding port and is arranged on the reinforcing plate, the automatic discharging assembly comprises a hopper, a partition plate and an automatic air cylinder capable of stretching out and drawing back at regular time, the hopper is arranged on the upper portion of the reinforcing plate, the partition plate is inserted into the bottom of the hopper, and the automatic air cylinder is connected with the partition plate. The air inlet is formed in the top of the drying mach