Welding clamp

The invention relates to the technical field of machining, in particular to a welding clamp. The welding clamp is used for clamping and fixing two workpieces so as to carry out welding operation and comprises a base, a first clamping seat and a second clamping seat. The first clamping seat comprises a first movable part, a first supporting part and a first clamping part, the first movable part is installed on the base and can be adjusted on the base in an ascending and descending manner, the first supporting part is rotatably connected to the first movable part, a containing through cavity is formed in the first supporting part, one workpiece can be horizontally placed on the containing through cavity, the first clamping part is adjustably arranged on the first supporting part, and the first clamping part can be connected to the workpiece in an abutting manner so that the workpiece can be clamped and fixed to the containing through cavity. The structure of the second clamping seat is the same as that of the f