Portable wire tap joint fusion welder

Disclosed is a portable wire tap joint fusion welder which is characterized in that the portable wire tap joint fusion welder comprises a transformer B and two silicon rectifier diodes D1 and D2, which are respectively connected to the 12V and 24V two-stage output terminal power resources of the secondary coil of transformer B. The silicon rectifier diodes D1 and D2 are respectively connected to the direct current carbon rod welding gun TH by the range-shifting switch K2. The current-controlled switch K3 and the DC ammeter are connected in series between the cathode of the secondary coil of transformer B and the heat radiating locking wire clamp SR. The utility model can guarantee 100% effective area contact of the ends of the tapping-off directing lines, which not only completely eliminates the problem of virtual connection of the directing lines, but also effectively solves the problem of largely taking up the box, so as to make the installation of panel apparatus no longer be affected.