The invention relates to a high-temperature soldering solder for soldering an inert anode for aluminium electrolysis and a metal conductive rod. The high-temperature soldering solder is characterized by comprising the following raw materials by mass percent: one or more of 15.00-35.00% of Cr, 5.00-25.00% of Ni and 0.05-10.00% of Si or 0.05-5.00% of B, one or more of 0.50-10.00% of Zr, 0.50-10.00% of Hf, 0.50-10.00% of Ti and 0.50-10.00% of Ta, one or more of 0.01-0.50% of La, 0.01-0.50% of Ce and 0.01-0.50% of Nb, and the balance of Co. The high-temperature soldering solder has the advantages that the high-temperature active solder can be used for directly soldering the ceramic base inert anode and the metal conductive rod without plating a film on the surface of the ceramic base inert anode or carrying out other modification treatment in advance before the soldering, is good in wettability for the ceramic base inert anode and the metal conductive rod, can maintain 60-70% of the room-temperature strength of the joint at 970 DEG C, does not contain a noble metal such as Pd and Au and is low in cost. The powdered solder can meet the needs of soldering all kinds of joints.