Metal welding clamp supporting frame

The utility model discloses a metal welding clamp supporting frame which comprises a base, two symmetrically-arranged supporting legs are arranged at the lower end of the base, two symmetrically-arranged supporting plates are arranged at the upper end of the base, supporting blocks are arranged above the two supporting plates, clamp bodies are arranged at the upper ends of the two supporting blocks, and the clamp bodies are arranged on the upper ends of the two supporting blocks. Inner threaded pipes are rotatably connected between the two supporting plates and the base in a penetrating mode, lifting mechanisms used for lifting the supporting blocks are arranged in the two inner threaded pipes, and a plurality of circumferentially-formed moving grooves are formed in the lower end of the base. And a limiting mechanism for limiting the lifting mechanism is arranged between the two moving grooves on the same side. The two threaded rods move upwards in the two inner threaded pipes respectively, so that the two th