Automobile sheet metal welding fixture

The utility model relates to a welding fixture structure in the field of welding, in particular to an automobile sheet metal welding fixture during spot welding of large sheet metals. The welding fixture consists of the following member units: a positioning and supporting unit (3) which is fixedly arranged on a worktable baseplane (1) and positions a sheet metal to be welded, a pressing unit (4) which is fixedly arranged on the worktable baseplane (4) and presses non welding points of the sheet metal to be welded, which is positioned by the positioning and supporting unit (3), and a welding unit (5) which is fixedly arranged on the worktable baseplane (1) and welds the positioned and pressed sheet metal to be welded. By the technical scheme, the welding fixture can accurately position and weld the sheet metal to be welded and reduce human input; and the welding fixture is simple in structure, high in production efficiency and good in welding quality.