Soldering paste for welding pure silver jewelry as well as preparation method and application of soldering paste

The invention relates to soldering paste for silver jewelry welding and a preparation method and application thereof, and belongs to the technical field of silver jewelry welding materials. The soldering paste for welding the pure silver jewelry is composed of metal brazing filler metal powder, brazing flux and a carrier. The mass ratio of the metal brazing filler metal powder to the brazing flux is (80-95): (5-20); the ratio of the mass sum of the metal brazing filler metal powder and the brazing flux to the mass of the carrier is (70-85): (15-30). The carrier contains waterborne polyurethane, cetostearyl alcohol and polyethylene glycol octylphenol ether, so that the effects of increasing viscosity, thickening and preventing sedimentation can be achieved. The soldering paste for welding the pure silver jewelry is large in initial viscosity, good in film forming capacity, not prone to drying and not prone to sedimentation, a dispenser can be adopted for dispensing and positioning, the silver jewelry to be wel