The utility model discloses an ABS solid addition agent continuous and automatic drying device, and relates to an automatic device in chemical industry production, in particular to the ABS solid addition agent continuous and automatic drying device. The ABS solid addition agent continuous and automatic drying device comprises a positive-pressure conveying fan. A solid addition agent inside a solid addition agent loading hopper is fed into two drying stock bins through a rotary valve and a three-way reversing valve. The ABS solid addition agent continuous and automatic drying device further comprises a high-pressure centrifugal fan and two air heaters. After being heated, air passes through an air distributor and is fed into the two drying stock bins, and the solid addition agent is heated by the hot air, then passes through discharging rotary valves, is conveyed to a cyclone separator by a negative-pressure fan, and then enters a qualified stock bin to be used. The ABS solid addition agent continuous and automatic drying device has the advantages of being high in reliability, large in processing amount, small in labor cost and low in energy consumption.