Pressure-adjustable automatic triggering thermocouple spot welding pen

The embodiment of the invention relates to the technical field of thermocouple welding, and discloses a pressure-adjustable automatic triggering thermocouple spot welding pen which comprises a shell, a pressure adjusting mechanism, an electrode clamping mechanism and a switching mechanism. Wherein the shell comprises an upper shell and a lower shell which are buckled with each other to form a cavity; the pressure adjusting mechanism comprises a main body connecting rod, a pressure adjusting knob, a torsional spring and a torsional spring fixing rod; the back of the pressure adjusting knob is embedded in the upper shell, and the upper shell is provided with a rectangular groove for exposing the pressure adjusting knob; the electrode clamping mechanism comprises a welding electrode, an electrode clamping piece, an electrode locking nut and a limiting connector. The switch mechanism comprises a travel switch and a travel switch trigger rod; the travel switch is fixed on the inner surface of the upper shell; the