The invention discloses a drying device and a drying method for polyacrylamide. The drying device for the polyacrylamide comprises an air inlet fan, a hot blast stove, a fluidized bed and a flame retarding device; the hot blast stove comprises a stove body, a cold air inlet, a hot air outlet, a combustor, an ignition pipeline and a gas inlet pipeline, wherein the combustor is arranged inside the stove body, the cold air inlet and the hot air outlet are formed in the side walls of the stove body separately, the ignition pipeline and the gas inlet pipeline are connected to the side wall of the stove body, and the cold air inlet is connected to an outlet of the air inlet fan; wet polyacrylamide is arranged inside the fluidized bed, and the hot air outlet is connected to the fluidized bed; the flame retarding device is connected between the hot air outlet and the fluidized bed. According to the drying device and the drying method, the high-temperature smoke flame retarding device is arranged, produced high-temperature smoke enters the fluidized bed after undergoing flame retardance by the flame retarding device, and therefore the hidden danger of great possibility of combustion and explosion of wet polyacrylamide material in the drying process is avoided, and the process is safe and reliable.