Silber brazing paste FB123P, white paste, with strong activity and good high temperature resistance. It can remove fluoride effectively, improve brazing flux’s wettability on base materials and permeability, and ensure compact brazing connectors and joints and few residues after soldering together with silver base brazing flux brazing copper, copper alloy, steel, stainless steel and high-temperature alloy at 600~870℃. It adopts torch and induction soldering methods.