Copper brazing powder FB301, white powder, with strong activity. 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 copper base brazing flux brazing copper, copper alloy, steel and carbon steel at 850~1150℃. It adopts torch and induction soldering methods and is suitable for hardware, cutter and electric heating industries.