Hot-dip galvanized sheet is wildly used in construction,household appliances,ship,vehicle and vessel building and machinery,etc.In last ten years,with the development of automobile industry,the anti-eorrosion requirements for car body are increasingly strict,by which the rapid development in technology has been promoted.The application of hot-dip galvanized sheet,technological progress in production and some Chinese large units were introduced. Hot-dip galvanized sheet is wildly used in construction, household appliances, ship, vehicle and vessel building and machinery, etc.In last ten years, with the development of automobile industry, the anti-eorrosion requirements for car body are increasingly strict, by which the rapid development in technology has been promoted. The application of hot-dip galvanized sheet, technological progress in production and some Chinese large units were introduced.