The invention discloses a comprehensive continuous production line for hot galvanizing of flat iron (multiple bars) and hot galvanizing of steel strip, including feeding equipment, annealing reduction furnace, closed tension regulator, zinc pot, drawing machine, cooling and passivation drying device and blanking equipment, On the whole production line, according to the width specification of galvanized flat iron and steel strip, it passes through the feeding equipment, then enters the annealing reduction furnace for annealing and reduction, and then enters the zinc pot for galvanizing. After the flat iron and steel strip leave the zinc pot, there is a zinc layer on all four sides. The finished products of galvanized flat iron and galvanized steel strip discharge in the opposite direction. The galvanized flat iron and galvanized steel strip pass through the cooling and passivation drying devices through the drawing machine respectively, Finally, the blanking equipment tracks the transverse shear, and the computer controls the transverse shear according to the fixed length. The galvanized flat iron and galvanized steel belt after the transverse shear fall on the conveying roller table. The invention has the advantages of combining two production lines and reducing the invested capital and risk of entrepreneurs.