Steel-structure welding working platform

The invention discloses a steel-structure welding working platform. The steel-structure welding working platform comprises a platform body, tracks installed on the platform body, at least two rolling wheel devices located on the same track, a vertical index head mechanism and a liftable workbench. The index head mechanism and the rolling wheel devices are located on the same straight line. The liftable workbench can move on the platform body and is located beside the rolling wheel devices. The tracks comprise the first track and the second track which are in parallel. The rolling wheel devices are located on the first track. The vertical index head mechanism is fixed to the platform body and located at the end of the first track. The liftable platform is movably located on the second track. According to the steel-structure welding working platform, the two rolling wheel devices are used for bearing and overturning a round pipe to be machined, and therefore the positions, at different angles and different heights, of the round pipe can be machined on the same plane, machining is convenient, time and labor are saved, production efficiency is improved, and the safety accident rate is greatly reduced.