Steel structure welding device

The utility model provides a steel structure welding device. The steel structure welding device comprises a base; the supporting frame is fixedly mounted at the top of the base; the telescopic welding assembly is arranged on the supporting frame; the two pushing plates are both mounted at the top of the base in a sliding manner; the two supporting columns are fixedly mounted at the tops of the two pushing plates respectively; the two rotating columns are rotationally installed on the outer walls of the sides, away from each other, of the two supporting columns, and the ends, close to each other, of the two rotating columns penetrate through the two supporting columns correspondingly; and the two driven teeth are fixedly arranged on the two rotating columns in a sleeving mode correspondingly. The steel structure welding device has the advantages of being convenient to operate, improving welding precision and improving welding efficiency of steel pipe type workpieces. 本实用新型提供一种钢结构焊接装置。钢结构焊接装置，包括：底座；支撑架，所述支撑架固定安