Heat preservation nail welding gun

The utility model relates to the field of heat preservation nail welding equipment, and particularly discloses a heat preservation nail welding gun which is used for welding heat preservation nails and comprises a gun body, a conductive rod, a sliding block and a spring. The conductive rod is fixedly arranged in the gun body and right faces the muzzle in the axial direction. One end of the conductive rod away from the muzzle is connected with an electrode wire; the sliding block is slidably arranged in the muzzle. A gap is kept between the sliding block and one end, close to the muzzle, of the current-conducting rod, and the sliding block directly faces the current-conducting rod along the axial direction of the current-conducting rod; a first through hole penetrating through the thickness direction is formed in the sliding block, and the conductive rod can penetrate through the sliding block through the first through hole to be in contact with the heat preservation nail located at the muzzle; the sliding blo