Welding gun with double tungsten electrodes for activating flux TIG (tungsten inert gas) welding

The invention discloses a welding gun with double tungsten electrodes for activating flux TIG (tungsten inert gas) welding. The welding gun is provided with a welding gun main body (1) which is formed by forming a cooling system by cooling water inlets-outlets (2) of the welding gun, introducing protective gas via a gas introduction port (3), connecting tungsten electrode fixing adjustment devices (4), and connecting an insulating laminar-flow device (5), wherein the insulating laminar-flow device (5) is connected with a nozzle (6), and the welding main body is separated by an insulating separation piece (9) to realize independently adjustable currents of the two tungsten electrodes; the nozzle (6) is divided into two parts by a separation piece (7) to realize different gas atmospheres; a first tungsten electrode (8) is fixed by a first tungsten electrode fixing adjustment mechanism (4), and a second tungsten electrode (8') is fixed by a second tungsten electrode fixing adjustment mechanism (4'); and a contin