The invention discloses a production line for a bottom cover of an iron gas mist tank. The production line for the bottom cover of the iron gas mist tank includes an iron board feeder, a numerical control punch, a round edge machine, a glue injection machine, a metal cover online detection machine, a first electromagnetic drying furnace, a first bottom cover magnetic levitation separation channel,a second electromagnetic drying furnace, a second bottom cover magnetic levitation separation channel and a bagging machine. A temporary discharging unit is arranged on a second conveyor belt betweenthe round edge machine and the glue injection machine to prevent the bottom cover from piling up and blocking on the second conveyor belt when the glue injection machine fails. A circulating fan, a dryer and a deodorizer are arranged in each of the two electromagnetic drying furnaces to suck, dry and deodorize the water vapor and glue odor which suspended in electromagnetic heating pipelines andare difficult to disperse and volatilize. The two bottom cover magnetic levitation separation channels effectively separate and disperse the iron bottom cover by using the magnetic field of the magnetgroup, and further dry the bottom cover and reduce the temperature of the bottom cover by using a blower device. The production line for the bottom cover of the iron gas mist tank has the advantagesof rapid drying and good drying effect.