The invention provides an electroplating automatic line exhaust mechanism, and belongs to the field of electroplating equipment. The electroplating automatic line exhaust mechanism comprises exhaust assemblies, single-groove air flues, main air flues and fans, wherein the exhaust assemblies, the single-groove air flues, the main air flues and the fans are arranged on the two sides of the upper ends of solution tanks; each exhaust assembly is arranged corresponding to one single-groove air flue and comprises an air cover, a door cover, an air cover air cavity and an air sucking opening; the airsucking openings communicate with the interiors of the air cavities and the interiors of the solution tanks; one ends of the air cavities communicate with the single-groove air flues which communicate with the main air flues; the fans are arranged at the ends, away from the single-groove air flues, of the main air flues; and the door covers are arranged at the ends, close to the solution tanks, of the air covers, and the height of the lower end faces of the door covers is smaller than that of the air sucking openings. The electroplating automatic line exhaust mechanism is simple in structure,good in air sucking effect, free of leakage, and capable of achieving energy saving and environmental protection.