Slow cooling treatment device

The utility model relates to the technical field of chemical filament mechanical manufacture, in particular to a slow cooling treatment device for industrial polyamide yarns. The device comprises a front bracket and a back bracket, wherein the front bracket and the back bracket are fixedly connected with each other to form an annular sealed structure; a front heater is fixedly arranged on the front bracket; a back heater is fixedly arranged on the back bracket; a suction cavity is formed in the front bracket; the suction opening of the suction cavity and the front bracket form an air suction slit opening; a water mist spraying pipe is arranged in the suction cavity; two ends of the suction cavity are respectively connected with a stainless steel corrugated pipe by a smoke exhaust opening; and the stainless steel corrugated pipe is communicated with a water spraying negative pressure pipe. The slow cooling treatment device provided by the utility model has a beautiful appearance and is beneficial for an operat