Abstract: Welding is widely used in the manufacture of bridge structure and manual welding and submerged arc auto welding are always employed.In order to confirm the adaptabilitg of 321-Q370q clad plates to welding requirements in bridge mannfacturing the welding joint performance test of manual welding and the submerged arc welding has been carried.The test result indicated that both kinds of welding joints meet the requirements stipwated in related specifications.