Tungsten electrode clamping device capable of rapidly replacing tungsten electrode for welding gun

The utility model relates to a welding gun tungsten electrode clamping device capable of quickly replacing tungsten electrode, which comprises a connecting body assembled on a welding gun body, a tungsten electrode clamp assembled on the inner side of the connecting body and an adjusting component, the tungsten electrode clamp is provided with a mounting hole along the axial direction in a penetrating manner, a tungsten electrode bar is inserted into the mounting hole in a penetrating manner, and the adjusting component is arranged on the inner side of the connecting body. The adjusting assembly comprises a clamping part, a check ring and an adjusting channel which are concentrically arranged on the connecting body, the clamping part is rotatably sleeved with the check ring, the adjusting channel is arranged in the radial direction of the clamping part and communicated with the mounting hole, an adjusting piece is movably placed in the adjusting channel, an ejector block is arranged on the inner side of the c