Welding production line, assembling device and clamping workbench of assembling device

The invention relates to a welding production line, an assembling device and a clamping workbench, the clamping workbench comprises a frame, a first clamp mechanism and a plurality of second clamp mechanisms, the first clamp mechanism comprises a first sliding table and a plurality of second sliding tables, the first sliding table can move relative to the frame in the first direction, and the second sliding tables can move relative to the frame in the second direction; the second clamp mechanism comprises a third sliding table, a fourth sliding table and a mounting plate, the third sliding table can move relative to the frame in the second direction, and the fourth sliding table can move relative to the third sliding table in the third direction; the mounting plate is connected with the fourth sliding table and can move relative to the fourth sliding table in the first direction. According to the welding production line, the splicing device and the clamping workbench, switching can be conveniently and efficie