Plate spring support welding clamp

The invention relates to the technical field of metal welding, in particular to a plate spring support welding clamp which comprises a bottom plate, a driving unit and a clamping mechanism. The left end faces and the right end faces of the two U-shaped metal transverse plates are aligned through the first clamping set in the clamping mechanism, the two U-shaped metal transverse plates are parallel to each other, and then a metal vertical plate placed on the two U-shaped metal transverse plates is centered and clamped in the front-back direction and the left-right direction through the second clamping set; the metal vertical plate is located in the middle area of the upper end faces of the two U-shaped metal transverse plates, the situation that the bearing capacity of the plate spring support is reduced after welding due to the fact that the position of the metal vertical plate deviates is avoided, and then a worker uses welding equipment to weld the connecting position of the metal transverse plates and the