The invention discloses a 
polyamide granulation system. According to the technological process, a 
granulation mechanism, a 
granulation conveying mechanism and a granulation grading discharging mechanism are sequentially included from front to back; the granulation mechanism comprises a distributing device and a transmission device; the granulation conveying mechanism comprises a conveying device, and conveys granules flowing out of the granulation cylinder; a plurality of automatic spraying devices are arranged on one side of the conveying device, and a 
waste gas collection device is arranged above the conveying device; the 
waste gas collection device comprises an air draft device and a ventilation channel; and the granulation grading discharging mechanism comprises a scraper, a 
sieve, a discharging hopper, an 
air blower, a separating device, a discharging 
pipe, a floccule collecting device and a second multi-way 
pipe. Mounting flexibility of a motor can be improved, the 
impurity rate of a product obtained after granulation is reduced, and the 
system has the advantages of having the grading function, being capable of carrying out proper cooling, exhausting organic 
waste gas in time, and ensuring normal operation of a leveling plate.